-40+3r=8+7(4-5r)

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Solution for -40+3r=8+7(4-5r) equation:


Simplifying
-40 + 3r = 8 + 7(4 + -5r)
-40 + 3r = 8 + (4 * 7 + -5r * 7)
-40 + 3r = 8 + (28 + -35r)

Combine like terms: 8 + 28 = 36
-40 + 3r = 36 + -35r

Solving
-40 + 3r = 36 + -35r

Solving for variable 'r'.

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

Add '35r' to each side of the equation.
-40 + 3r + 35r = 36 + -35r + 35r

Combine like terms: 3r + 35r = 38r
-40 + 38r = 36 + -35r + 35r

Combine like terms: -35r + 35r = 0
-40 + 38r = 36 + 0
-40 + 38r = 36

Add '40' to each side of the equation.
-40 + 40 + 38r = 36 + 40

Combine like terms: -40 + 40 = 0
0 + 38r = 36 + 40
38r = 36 + 40

Combine like terms: 36 + 40 = 76
38r = 76

Divide each side by '38'.
r = 2

Simplifying
r = 2

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