Question

simplifique as equaçaoes e resolva as a)8a+2-3a=7 b)4.(2x-3)+6x=16 c)15x-3.(3x+6)+3=27 d)7-2.(y-6)+6.(1+5y)=39

Answer 1

a) 8a+2-3a=7
5a=7-2
5a=5
a=5÷5
a=1

b)4•(2x-3)+6x=16
8x-12+6x=16
14x=16+12
14x=28
x=28÷14
x=2

c)15x-3•(3x+6)+3=27
15x-9x-18+3=27
6x=27+18-3
6x=42
x=42÷6
x=7

d)7-2•(y-6)+6•(1+5y)=39
7-2y+12+6+30y=39
28y+27=39
28y=39-27
28y=14
y=14÷28
y=0,5