Question

S adding the quantity -12 + 8r to an expression

the same as subtracting -8r + 12 from the same
expression? Explain your reasoning.

Answer 1

r=1.5

Explanation:

-12+8r = -8r +12

+8r +8r

-12 + 16r = 12

+12 +12

16r=24

/16 /16

r=1.5

the values do not cancel each other out