Question

1) resolva a equacão. A) 7(2×-3)+2(×+1)-5(×-9)=3+10. B) 2x+3.(×-5)=4×+9

Answer 1

A)
7(2x-3)+2(x+1)-5(x-9)=3+10
14x-21+2x+2-5x-45=13
14x+2x-5x=13+21-2+45
11x=77
x=77/11
(x=7)

B)
2x+3(x-5)=4x+9
2x+3x-15=4x+9
2x+3x-4x=9+15
(x=23)