Solve for x
x=42
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42+x=172-2x-4
Use the distributive property to multiply 2 by 86-x.
42+x=168-2x
Subtract 4 from 172 to get 168.
42+x+2x=168
Add 2x to both sides.
42+3x=168
Combine x and 2x to get 3x.
3x=168-42
Subtract 42 from both sides.
3x=126
Subtract 42 from 168 to get 126.
x=\frac{126}{3}
Divide both sides by 3.
x=42
Divide 126 by 3 to get 42.
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