78+5(4-2x)=21+x

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Solution for 78+5(4-2x)=21+x equation:


Simplifying
78 + 5(4 + -2x) = 21 + x
78 + (4 * 5 + -2x * 5) = 21 + x
78 + (20 + -10x) = 21 + x

Combine like terms: 78 + 20 = 98
98 + -10x = 21 + x

Solving
98 + -10x = 21 + x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
98 + -10x + -1x = 21 + x + -1x

Combine like terms: -10x + -1x = -11x
98 + -11x = 21 + x + -1x

Combine like terms: x + -1x = 0
98 + -11x = 21 + 0
98 + -11x = 21

Add '-98' to each side of the equation.
98 + -98 + -11x = 21 + -98

Combine like terms: 98 + -98 = 0
0 + -11x = 21 + -98
-11x = 21 + -98

Combine like terms: 21 + -98 = -77
-11x = -77

Divide each side by '-11'.
x = 7

Simplifying
x = 7

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