40-7r=2(8r+6)+5r

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Solution for 40-7r=2(8r+6)+5r equation:


Simplifying
40 + -7r = 2(8r + 6) + 5r

Reorder the terms:
40 + -7r = 2(6 + 8r) + 5r
40 + -7r = (6 * 2 + 8r * 2) + 5r
40 + -7r = (12 + 16r) + 5r

Combine like terms: 16r + 5r = 21r
40 + -7r = 12 + 21r

Solving
40 + -7r = 12 + 21r

Solving for variable 'r'.

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

Add '-21r' to each side of the equation.
40 + -7r + -21r = 12 + 21r + -21r

Combine like terms: -7r + -21r = -28r
40 + -28r = 12 + 21r + -21r

Combine like terms: 21r + -21r = 0
40 + -28r = 12 + 0
40 + -28r = 12

Add '-40' to each side of the equation.
40 + -40 + -28r = 12 + -40

Combine like terms: 40 + -40 = 0
0 + -28r = 12 + -40
-28r = 12 + -40

Combine like terms: 12 + -40 = -28
-28r = -28

Divide each side by '-28'.
r = 1

Simplifying
r = 1

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