Question

resolva as equacoes:a)x÷3=7 b)x÷4=_3 c)2x÷5=4 d)2x÷3=_10 e)3x÷4=30 f)2x÷5=_18

Answer 1

a)x/3=7
x=7*3
x=21

b)x/4= -3
x= -3*4
x= -12

c)2x/5=4
2x=4*5
2x=20
x=20/2
x=10

d)2x/3= -10
2x= -10*3
2x= -30
x= -30/2
x= -15

e)3x/4=30
3x=30*4
3x=120
x=120/3
x=40

f)2x/5= -18
2x= -18*5
2x= -90
x= -90/2
x= -45