Solve for r
r=0
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-18+36r=-18+4r
Use the distributive property to multiply -6 by 3-6r.
-18+36r-4r=-18
Subtract 4r from both sides.
-18+32r=-18
Combine 36r and -4r to get 32r.
32r=-18+18
Add 18 to both sides.
32r=0
Add -18 and 18 to get 0.
r=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 32 is not equal to 0, r must be equal to 0.
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