Question

Me ajudem pfv é serio
4. 4 (10-x) = 20

2. 3(3 – m) + m = 7

Answer 1

4.4 (10-x)=20
16 (10-x)=20
160-16x=20
-16x=20-160
-16x=-140 .(-1)
16x=140
x=140/16 (simplifica por 4)
x=35/4

2.3(3-m) +m=7
6(3-m)+m=7
18-6m+m=7
-6m+m=7-18
-5m=-11 .(-1)
5m=11
m=11/5