Respuesta :

2r-3.1=1.7 add 3.1

2r=1.7+3.1 divide by 2 to isolate r

2r/2=4.8/2

r=2.4

check

2(2.4)-3.1=1.7

4.8-3.1=1.7

1.7=1.7

4t+3.5=12.5 sub 3.5

4t=12.5-3.5 divide by 4

4t/4=9/4

t=9/4

check

4(9/4)+3.5=12.5

9+3.5=12.5

12.5=12.5

8m-5.5=10.1 add 5.5

8m=10.1+5.5 divide by 8

8m/8=15.6/8

m=1.95

check

8(1.95)-5.5=10.1

15.6-5.5=10.1

10.1=10.1