13+8(5x-8)=21

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Solution for 13+8(5x-8)=21 equation:


Simplifying
13 + 8(5x + -8) = 21

Reorder the terms:
13 + 8(-8 + 5x) = 21
13 + (-8 * 8 + 5x * 8) = 21
13 + (-64 + 40x) = 21

Combine like terms: 13 + -64 = -51
-51 + 40x = 21

Solving
-51 + 40x = 21

Solving for variable 'x'.

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

Add '51' to each side of the equation.
-51 + 51 + 40x = 21 + 51

Combine like terms: -51 + 51 = 0
0 + 40x = 21 + 51
40x = 21 + 51

Combine like terms: 21 + 51 = 72
40x = 72

Divide each side by '40'.
x = 1.8

Simplifying
x = 1.8

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