0.1(x+50)+0.7x=21

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Solution for 0.1(x+50)+0.7x=21 equation: 


Simplifying
0.1(x + 50) + 0.7x = 21

Reorder the terms:
0.1(50 + x) + 0.7x = 21
(50 * 0.1 + x * 0.1) + 0.7x = 21
(5 + 0.1x) + 0.7x = 21

Combine like terms: 0.1x + 0.7x = 0.8x
5 + 0.8x = 21

Solving
5 + 0.8x = 21

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 0.8x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 0.8x = 21 + -5
0.8x = 21 + -5

Combine like terms: 21 + -5 = 16
0.8x = 16

Divide each side by '0.8'.
x = 20

Simplifying
x = 20

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