81-5=7x+21

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Solution for 81-5=7x+21 equation:


Simplifying
81 + -5 = 7x + 21

Combine like terms: 81 + -5 = 76
76 = 7x + 21

Reorder the terms:
76 = 21 + 7x

Solving
76 = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
76 + -7x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
76 + -7x = 21 + 0
76 + -7x = 21

Add '-76' to each side of the equation.
76 + -76 + -7x = 21 + -76

Combine like terms: 76 + -76 = 0
0 + -7x = 21 + -76
-7x = 21 + -76

Combine like terms: 21 + -76 = -55
-7x = -55

Divide each side by '-7'.
x = 7.857142857

Simplifying
x = 7.857142857

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