Question

Resolva as equações abaixo:

y=3x
x+4y=26

x/2 +y=7
2y-x=10

3x+y=12
x-5y=4

2x+3y=11
x+5y=16

Answer 1

y =3x
x+4×3x=26
x+12x=26
13x=26
x=26/13
x=2
y=3×2
y=6

x=14-2y
2y-14-2y=10
2y-2y=10+14
y=24
x=14-2×24
x=14-48
x=34

y=12-3x
x-5(12-3x)=4
x-60+15x=4
x+15x=4+60
16x=64
x=64/16
x=4
y=12-3×4
y=12-12
y=0

x=16-5y
2(16-5y)+3y=11
32-10y+3y=11
-10y+3y=11-32
-7y=-21
y=-21/-7
y=3
x=16-5×3
x=16-15
x=1
espero ter ajudado ♥