21=-7x+10

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Solution for 21=-7x+10 equation:


Simplifying
21 = -7x + 10

Reorder the terms:
21 = 10 + -7x

Solving
21 = 10 + -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.
21 + 7x = 10 + -7x + 7x

Combine like terms: -7x + 7x = 0
21 + 7x = 10 + 0
21 + 7x = 10

Add '-21' to each side of the equation.
21 + -21 + 7x = 10 + -21

Combine like terms: 21 + -21 = 0
0 + 7x = 10 + -21
7x = 10 + -21

Combine like terms: 10 + -21 = -11
7x = -11

Divide each side by '7'.
x = -1.571428571

Simplifying
x = -1.571428571

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