2r + 8 - r = -7

Combine like terms

-15

Step-by-step explanation: 2r+8-r=-7

1r +8 = -7

1/1       -15/1

r = -15

Step-by-step explanation:

2r - r = -7 -8

r = -15

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.

the answer would be c:   ax + b = ax + c

step-by-step explanation: