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-12(r+3)-19+15r=4r-4(r-13)
We simplify the equation to the form, which is simple to understand
-12(r+3)-19+15r=4r-4(r-13)
Reorder the terms in parentheses
+(-12r-36)-19+15r=4r-4*(r-13)
Remove unnecessary parentheses
-12r-36-19+15r=+4r-4+*(+r-13+)
Reorder the terms in parentheses
-12r-36-19+15r=4r+(-4r+52)
Remove unnecessary parentheses
-12r-36-19+15r=+4r-4r+52
We move all terms containing r to the left and all other terms to the right.
-12r+15r-4r+4r=+52+36+19
We simplify left and right side of the equation.
+3r=+107
We divide both sides of the equation by 3 to get r.
r=35.6666666667
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