Question

qual a resposta das equações 10=2×+3, 17=8×-7, 5m+1=3m-9,4a+a-5=2a+11?

Answer 1

-2x=3-10
-2x=-7.(-1)
2x=7
x=7/2=3,5

-8x=-7-17
-8x=-24.(-1)
8x=24
x=24/8=3

5m-3m=-1-9
2m=-10
m=-10/2=-5

4a+a-2a=11+5
3a+16
a=16/3=5,3