What is the answer to 8r+11r-5r-12r=42 ?

The answer to 8r+11r-5r-12r=42 is r=21

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8r+11r-5r-12r=42

8 r + 11 r - 5 r - 12 r = 42

r = 21

Solution steps

8 r + 11 r - 5 r - 12 r = 42

Add similar elements:

8 r + 11 r - 5 r - 12 r = 2 r

2 r = 42

Divide both sides by

2

r = 21

2 x + 3 (x + 5) = 5 (x - 3)

x^{0} = 2

- (- 2 x - 1) - (x + 3) = x + 16

\frac{p}{1 \frac{6}{7}} = - 4.4

x - 8 = 2