8(r-2)-7(r-1)=2(r+4)

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Solution for 8(r-2)-7(r-1)=2(r+4) equation:


Simplifying
8(r + -2) + -7(r + -1) = 2(r + 4)

Reorder the terms:
8(-2 + r) + -7(r + -1) = 2(r + 4)
(-2 * 8 + r * 8) + -7(r + -1) = 2(r + 4)
(-16 + 8r) + -7(r + -1) = 2(r + 4)

Reorder the terms:
-16 + 8r + -7(-1 + r) = 2(r + 4)
-16 + 8r + (-1 * -7 + r * -7) = 2(r + 4)
-16 + 8r + (7 + -7r) = 2(r + 4)

Reorder the terms:
-16 + 7 + 8r + -7r = 2(r + 4)

Combine like terms: -16 + 7 = -9
-9 + 8r + -7r = 2(r + 4)

Combine like terms: 8r + -7r = 1r
-9 + 1r = 2(r + 4)

Reorder the terms:
-9 + 1r = 2(4 + r)
-9 + 1r = (4 * 2 + r * 2)
-9 + 1r = (8 + 2r)

Solving
-9 + 1r = 8 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-9 + 1r + -2r = 8 + 2r + -2r

Combine like terms: 1r + -2r = -1r
-9 + -1r = 8 + 2r + -2r

Combine like terms: 2r + -2r = 0
-9 + -1r = 8 + 0
-9 + -1r = 8

Add '9' to each side of the equation.
-9 + 9 + -1r = 8 + 9

Combine like terms: -9 + 9 = 0
0 + -1r = 8 + 9
-1r = 8 + 9

Combine like terms: 8 + 9 = 17
-1r = 17

Divide each side by '-1'.
r = -17

Simplifying
r = -17

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