12 multiple-choice questions, progressively harder.
Solve 4(x−1)=2(x+3)4(x - 1) = 2(x + 3)4(x−1)=2(x+3).
Solution
Correct answer: C
Distribute on each side, then gather the variable.
4x−4=2x+6,2x=10,x=54x - 4 = 2x + 6, \qquad 2x = 10, \qquad x = 54x−4=2x+6,2x=10,x=5
Solve 3(x+4)=5(x−2)3(x + 4) = 5(x - 2)3(x+4)=5(x−2).
Correct answer: D
Distribute on each side, then collect the variable on the right.
3x+12=5x−10,22=2x,x=113x + 12 = 5x - 10, \qquad 22 = 2x, \qquad x = 113x+12=5x−10,22=2x,x=11
Solve x−3(x−2)=10x - 3(x - 2) = 10x−3(x−2)=10.
Correct answer: B
Distribute the −3-3−3, combine like terms, then divide by −2-2−2.
x−3x+6=10,−2x+6=10,−2x=4,x=−2x - 3x + 6 = 10, \qquad -2x + 6 = 10, \qquad -2x = 4, \qquad x = -2x−3x+6=10,−2x+6=10,−2x=4,x=−2
Solve 6x−5=3(x+1)+2x6x - 5 = 3(x + 1) + 2x6x−5=3(x+1)+2x.
Correct answer: A
Simplify the right side first, then gather the variable.
6x−5=5x+3,x=86x - 5 = 5x + 3, \qquad x = 86x−5=5x+3,x=8
Solve 9−2(x−1)=39 - 2(x - 1) = 39−2(x−1)=3.
Distribute the −2-2−2, combine, then divide by −2-2−2.
9−2x+2=3,11−2x=3,−2x=−8,x=49 - 2x + 2 = 3, \qquad 11 - 2x = 3, \qquad -2x = -8, \qquad x = 49−2x+2=3,11−2x=3,−2x=−8,x=4
Solve 3(x−5)=x−33(x - 5) = x - 33(x−5)=x−3.
Distribute the 333, subtract xxx, then solve.
3x−15=x−3,2x=12,x=63x - 15 = x - 3, \qquad 2x = 12, \qquad x = 63x−15=x−3,2x=12,x=6
Solve 2(x+3)+3(x−1)=182(x + 3) + 3(x - 1) = 182(x+3)+3(x−1)=18.
Distribute both products, combine like terms, then solve.
2x+6+3x−3=18,5x+3=18,x=32x + 6 + 3x - 3 = 18, \qquad 5x + 3 = 18, \qquad x = 32x+6+3x−3=18,5x+3=18,x=3
Solve 10−(2x+3)=110 - (2x + 3) = 110−(2x+3)=1.
Distribute the minus sign, combine, then divide by −2-2−2.
10−2x−3=1,7−2x=1,−2x=−6,x=310 - 2x - 3 = 1, \qquad 7 - 2x = 1, \qquad -2x = -6, \qquad x = 310−2x−3=1,7−2x=1,−2x=−6,x=3
Solve 2(x−1)+3x=4(x+2)2(x - 1) + 3x = 4(x + 2)2(x−1)+3x=4(x+2).
Distribute and combine on the left, then gather the variable.
5x−2=4x+8,x=105x - 2 = 4x + 8, \qquad x = 105x−2=4x+8,x=10
For what value of xxx is 4x+14x + 14x+1 equal to 2x+92x + 92x+9?
Set the two expressions equal and solve.
4x+1=2x+9,2x=8,x=44x + 1 = 2x + 9, \qquad 2x = 8, \qquad x = 44x+1=2x+9,2x=8,x=4
Solve −3(x−2)=2(4−x)-3(x - 2) = 2(4 - x)−3(x−2)=2(4−x).
Distribute on each side, then move the variable to one side.
−3x+6=8−2x,6=8+x,x=−2-3x + 6 = 8 - 2x, \qquad 6 = 8 + x, \qquad x = -2−3x+6=8−2x,6=8+x,x=−2
Solve 5(x+1)−2(x−3)=205(x + 1) - 2(x - 3) = 205(x+1)−2(x−3)=20.
5x+5−2x+6=20,3x+11=20,x=35x + 5 - 2x + 6 = 20, \qquad 3x + 11 = 20, \qquad x = 35x+5−2x+6=20,3x+11=20,x=3
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