Question

-28 + 10.r - 5.r = 42

step my step explation​

Answer 1

Answer: $r=14$

Step-by-step explanation:

1) Move all terms to the left: $-28+10r-5r-(42)=0$

2) Add all the numbers together, and all the variables: $5r-70=0$

3) Move all terms containing r to the left, all other terms to the right: $5r=70$

$r=70/5$

$r=14$

Answer 2

Answer:

r = 14

Step-by-step explanation:

-28 + 10r - 5r = 42

(Subtract the like terms, 10r - 5r)

-28 + 5r = 42

(Add +28 to each side)

+28 - 28 + 5r = 42 + 28

(Subtract like terms, 28 - 28 and add terms 42 + 28)

5r = 70

(Divide each side by /5)

5/5r = 70/5

(Divide)

r = 14