7(r-5)+5(4r+6)=76

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Solution for 7(r-5)+5(4r+6)=76 equation:


Simplifying
7(r + -5) + 5(4r + 6) = 76

Reorder the terms:
7(-5 + r) + 5(4r + 6) = 76
(-5 * 7 + r * 7) + 5(4r + 6) = 76
(-35 + 7r) + 5(4r + 6) = 76

Reorder the terms:
-35 + 7r + 5(6 + 4r) = 76
-35 + 7r + (6 * 5 + 4r * 5) = 76
-35 + 7r + (30 + 20r) = 76

Reorder the terms:
-35 + 30 + 7r + 20r = 76

Combine like terms: -35 + 30 = -5
-5 + 7r + 20r = 76

Combine like terms: 7r + 20r = 27r
-5 + 27r = 76

Solving
-5 + 27r = 76

Solving for variable 'r'.

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

Add '5' to each side of the equation.
-5 + 5 + 27r = 76 + 5

Combine like terms: -5 + 5 = 0
0 + 27r = 76 + 5
27r = 76 + 5

Combine like terms: 76 + 5 = 81
27r = 81

Divide each side by '27'.
r = 3

Simplifying
r = 3

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