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If 30(x-10)=120 then x=

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30(x - 10) = 120

Use distributive property to remove the parenthesis
30x - 30(10) = 120
30x - 300 = 120

move the constant to the right side
30x - 300 = 120
30x = 120 + 300
30x = 420

solve for x by moving 30 to the right side, multiplication will be division after moved to the right side
30x = 420
x = 420/30
x = 14

The value of x is 14
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