Question

$alguem \: \: pode \: me \: ajudar \: as \: perguntas \: estao \: na \: foto \: a \: cima.$

Answer 1

4-
A) 7(x-2)=5(x-3)
7x-14=5x-15
7x-5x=-15+14
2x=-1
x= -1/2=-0,5
B) 7(x-1) -2(x-5)=x-5
7x-3x=-5-10+7
4x=-8
x=-8/4= -2
5)
A)x/2-x/4=1/2= 2x-x=2
x=2
B) x/6+x/4+=x/3+1=
2x+9x/12=4x-12/12
2x+3x-4x=-12
x=-12
C) x-5/3+3x-1/2=4
2x-10+9x-3=24
11x=24+3+10
11x= 37
x=37/11
x= 3,36