Question

Solve this equation for r:
(2+3)r – 6 = 31

Answer 1

5-6=31

Answer 2

Distributing that r would work, but to my mind it'd be far more efficient NOT to distribute the r. We want to isolate r, not have r in several terms.

Answer 3

(2+3)r – 6 = 31
May I suggest adding 6 to both sides, to further isolate that r?

Answer 4

im sorry im trying i never done these

Answer 5

You're familiar with adding a number to both sides of an equation?

Answer 6

add 6 to 5?

Answer 7

Thank you for contributing, @Ludwig457.

Answer 8

What I see is (2+3)r-6=31.

If you combine 2 and 3, you get 2+3 = 5.
Thus, (2+3)r=5r,
and 5r-6 = 31.
+6= +6
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Please complete this work.

Answer 9

By inspection:
r = (31+6)/5

Answer 10

Couldn't agree more! But I sense that @LaBlueEyes2013 would appreciate a step-by-step approach the first time through a problem such as this one.

Answer 11

(2+3)r – 6 = 31
1. combine 2 and 3: 2+3 = 5, and so (2+3)r = 5r
2. rewrite the equation as 5r - 6 = 31.
3. Add 6 to both sides and simplify the resulting equation.