7x-4(3-2x)-(2x-5)=21

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Solution for 7x-4(3-2x)-(2x-5)=21 equation:


Simplifying
7x + -4(3 + -2x) + -1(2x + -5) = 21
7x + (3 * -4 + -2x * -4) + -1(2x + -5) = 21
7x + (-12 + 8x) + -1(2x + -5) = 21

Reorder the terms:
7x + -12 + 8x + -1(-5 + 2x) = 21
7x + -12 + 8x + (-5 * -1 + 2x * -1) = 21
7x + -12 + 8x + (5 + -2x) = 21

Reorder the terms:
-12 + 5 + 7x + 8x + -2x = 21

Combine like terms: -12 + 5 = -7
-7 + 7x + 8x + -2x = 21

Combine like terms: 7x + 8x = 15x
-7 + 15x + -2x = 21

Combine like terms: 15x + -2x = 13x
-7 + 13x = 21

Solving
-7 + 13x = 21

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 13x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 13x = 21 + 7
13x = 21 + 7

Combine like terms: 21 + 7 = 28
13x = 28

Divide each side by '13'.
x = 2.153846154

Simplifying
x = 2.153846154

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