12 multiple-choice questions, progressively harder.
Solve 2(x+5)=3x+42(x + 5) = 3x + 42(x+5)=3x+4.
Solution
Correct answer: A
Distribute the 222, then subtract 2x2x2x from both sides.
2x+10=3x+4,6=x2x + 10 = 3x + 4, \qquad 6 = x2x+10=3x+4,6=x
Solve 6(x−2)=2(x+2)6(x - 2) = 2(x + 2)6(x−2)=2(x+2).
Correct answer: C
Distribute on each side, then solve.
6x−12=2x+4,4x=16,x=46x - 12 = 2x + 4, \qquad 4x = 16, \qquad x = 46x−12=2x+4,4x=16,x=4
Solve 4x−(x−6)=184x - (x - 6) = 184x−(x−6)=18.
Correct answer: B
Distribute the minus sign, combine like terms, then solve.
4x−x+6=18,3x+6=18,x=44x - x + 6 = 18, \qquad 3x + 6 = 18, \qquad x = 44x−x+6=18,3x+6=18,x=4
Solve 3(2x+1)=4(x+2)3(2x + 1) = 4(x + 2)3(2x+1)=4(x+2).
Correct answer: D
Distribute on each side, then solve; the answer need not be a whole number.
6x+3=4x+8,2x=5,x=526x + 3 = 4x + 8, \qquad 2x = 5, \qquad x = \frac{5}{2}6x+3=4x+8,2x=5,x=25
Solve 5x−4=2(x+4)5x - 4 = 2(x + 4)5x−4=2(x+4).
Distribute on the right, then gather the variable.
5x−4=2x+8,3x=12,x=45x - 4 = 2x + 8, \qquad 3x = 12, \qquad x = 45x−4=2x+8,3x=12,x=4
Solve 8−3(x−1)=28 - 3(x - 1) = 28−3(x−1)=2.
Distribute the −3-3−3, combine, then divide by −3-3−3.
8−3x+3=2,11−3x=2,−3x=−9,x=38 - 3x + 3 = 2, \qquad 11 - 3x = 2, \qquad -3x = -9, \qquad x = 38−3x+3=2,11−3x=2,−3x=−9,x=3
Solve 5(2−x)=3(x−6)+45(2 - x) = 3(x - 6) + 45(2−x)=3(x−6)+4.
Distribute on each side, combine, then gather the variable.
10−5x=3x−14,24=8x,x=310 - 5x = 3x - 14, \qquad 24 = 8x, \qquad x = 310−5x=3x−14,24=8x,x=3
Solve 4(x−3)−2(x−5)=64(x - 3) - 2(x - 5) = 64(x−3)−2(x−5)=6.
Distribute both products, combine like terms, then solve.
4x−12−2x+10=6,2x−2=6,x=44x - 12 - 2x + 10 = 6, \qquad 2x - 2 = 6, \qquad x = 44x−12−2x+10=6,2x−2=6,x=4
Solve 6x−5=4x+76x - 5 = 4x + 76x−5=4x+7.
Subtract 4x4x4x, add 555, then divide by 222.
2x−5=7,2x=12,x=62x - 5 = 7, \qquad 2x = 12, \qquad x = 62x−5=7,2x=12,x=6
Solve x3−4=1\dfrac{x}{3} - 4 = 13x−4=1.
Add 444, then multiply both sides by 333.
x3=5,x=15\frac{x}{3} = 5, \qquad x = 153x=5,x=15
Solve 5x+2(x−3)=3(x+2)5x + 2(x - 3) = 3(x + 2)5x+2(x−3)=3(x+2).
Distribute and combine on the left, then gather the variable.
7x−6=3x+6,4x=12,x=37x - 6 = 3x + 6, \qquad 4x = 12, \qquad x = 37x−6=3x+6,4x=12,x=3
Solve 4(x+3)−5=3(x+4)4(x + 3) - 5 = 3(x + 4)4(x+3)−5=3(x+4).
4x+7=3x+12,x=54x + 7 = 3x + 12, \qquad x = 54x+7=3x+12,x=5
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