4 years ago

-78 = 5r +3 (5r - 6)

Mathematics

2 answers:

tresset_1 [31]4 years ago

7 0

Answer:

r=-3

Step-by-step explanation:

-78=5r+3(5r-6)

Multiply 3 by 5r and -6

-78=5r+15r-18

Combine like terms

-78=20r-18

Add 18 to both sides (-78+18=-60. -18 cancels out.)

-60=20r

Divide 20 to both sides.

-3=r

r=-3

Ksju [112]4 years ago

5 0

I think it might be r= -3

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