Question

Simplifique e resolva as equações:[a]9+2.[5x-4]=21 [b]10x+4.[3-2x]-6=8 [c]3.[5+3x]+5.[-x-1]=22 [d]2.[9x-4]-7+[6-5x].3=18POR FAVOR ME AJUDEM.CONTO COM VCS.

Answer 1

a) 9+2.(5x-4)=21
9+10x-8=21
10x= 21-9+8
10x=20⇒ x=20/10
x=2
b) 10x+4.(3 -2x) -6=8
10x+ 12-8x -6=8
10x-8x= 8+6-12
2x=2⇒x=2/2
x=1
c) 3.(5+3x) + 5.( -x-1)=22
15+9x-5x-5=22
9x-5x=22+5-15
4x=12⇒x=12/4
x=3
d)2.(9x-4)-7+(6-5x).3=18
18x-8 -7+18-15x=18
18x-15x=18-18+7+8
3x=15⇒x=15/3
x=5