16r − 4r + –13r − 7 = –8

r =

r=1

Step-by-step explanation:

16r - 4r + - 13r - 7 = - 8

16r - 4r + - 13r = - 8 + 7

12r + - 13r = - 8 + 7

- 1r = -1

r= 1

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.