Solve for x
x=21
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7x-126=3\left(x-14\right)
Use the distributive property to multiply 7 by x-18.
7x-126=3x-42
Use the distributive property to multiply 3 by x-14.
7x-126-3x=-42
Subtract 3x from both sides.
4x-126=-42
Combine 7x and -3x to get 4x.
4x=-42+126
Add 126 to both sides.
4x=84
Add -42 and 126 to get 84.
x=\frac{84}{4}
Divide both sides by 4.
x=21
Divide 84 by 4 to get 21.
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