3(5r-4)-4(r+9)=

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Solution for 3(5r-4)-4(r+9)= equation:


Simplifying
3(5r + -4) + -4(r + 9) = 0

Reorder the terms:
3(-4 + 5r) + -4(r + 9) = 0
(-4 * 3 + 5r * 3) + -4(r + 9) = 0
(-12 + 15r) + -4(r + 9) = 0

Reorder the terms:
-12 + 15r + -4(9 + r) = 0
-12 + 15r + (9 * -4 + r * -4) = 0
-12 + 15r + (-36 + -4r) = 0

Reorder the terms:
-12 + -36 + 15r + -4r = 0

Combine like terms: -12 + -36 = -48
-48 + 15r + -4r = 0

Combine like terms: 15r + -4r = 11r
-48 + 11r = 0

Solving
-48 + 11r = 0

Solving for variable 'r'.

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

Add '48' to each side of the equation.
-48 + 48 + 11r = 0 + 48

Combine like terms: -48 + 48 = 0
0 + 11r = 0 + 48
11r = 0 + 48

Combine like terms: 0 + 48 = 48
11r = 48

Divide each side by '11'.
r = 4.363636364

Simplifying
r = 4.363636364

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