3r+7(r+10)=5(r+2)

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Solution for 3r+7(r+10)=5(r+2) equation:


Simplifying
3r + 7(r + 10) = 5(r + 2)

Reorder the terms:
3r + 7(10 + r) = 5(r + 2)
3r + (10 * 7 + r * 7) = 5(r + 2)
3r + (70 + 7r) = 5(r + 2)

Reorder the terms:
70 + 3r + 7r = 5(r + 2)

Combine like terms: 3r + 7r = 10r
70 + 10r = 5(r + 2)

Reorder the terms:
70 + 10r = 5(2 + r)
70 + 10r = (2 * 5 + r * 5)
70 + 10r = (10 + 5r)

Solving
70 + 10r = 10 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
70 + 10r + -5r = 10 + 5r + -5r

Combine like terms: 10r + -5r = 5r
70 + 5r = 10 + 5r + -5r

Combine like terms: 5r + -5r = 0
70 + 5r = 10 + 0
70 + 5r = 10

Add '-70' to each side of the equation.
70 + -70 + 5r = 10 + -70

Combine like terms: 70 + -70 = 0
0 + 5r = 10 + -70
5r = 10 + -70

Combine like terms: 10 + -70 = -60
5r = -60

Divide each side by '5'.
r = -12

Simplifying
r = -12

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