3(r-3)+8(r+1)=-4(r-10)+4

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Solution for 3(r-3)+8(r+1)=-4(r-10)+4 equation:


Simplifying
3(r + -3) + 8(r + 1) = -4(r + -10) + 4

Reorder the terms:
3(-3 + r) + 8(r + 1) = -4(r + -10) + 4
(-3 * 3 + r * 3) + 8(r + 1) = -4(r + -10) + 4
(-9 + 3r) + 8(r + 1) = -4(r + -10) + 4

Reorder the terms:
-9 + 3r + 8(1 + r) = -4(r + -10) + 4
-9 + 3r + (1 * 8 + r * 8) = -4(r + -10) + 4
-9 + 3r + (8 + 8r) = -4(r + -10) + 4

Reorder the terms:
-9 + 8 + 3r + 8r = -4(r + -10) + 4

Combine like terms: -9 + 8 = -1
-1 + 3r + 8r = -4(r + -10) + 4

Combine like terms: 3r + 8r = 11r
-1 + 11r = -4(r + -10) + 4

Reorder the terms:
-1 + 11r = -4(-10 + r) + 4
-1 + 11r = (-10 * -4 + r * -4) + 4
-1 + 11r = (40 + -4r) + 4

Reorder the terms:
-1 + 11r = 40 + 4 + -4r

Combine like terms: 40 + 4 = 44
-1 + 11r = 44 + -4r

Solving
-1 + 11r = 44 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
-1 + 11r + 4r = 44 + -4r + 4r

Combine like terms: 11r + 4r = 15r
-1 + 15r = 44 + -4r + 4r

Combine like terms: -4r + 4r = 0
-1 + 15r = 44 + 0
-1 + 15r = 44

Add '1' to each side of the equation.
-1 + 1 + 15r = 44 + 1

Combine like terms: -1 + 1 = 0
0 + 15r = 44 + 1
15r = 44 + 1

Combine like terms: 44 + 1 = 45
15r = 45

Divide each side by '15'.
r = 3

Simplifying
r = 3

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