Question

resolva as seguintes equaçoes

a) 9+5y = -91
b) -4+8y = -68
c) 4x+3+2x = -9
d) 4x-10+8x = 50

Answer 1

Olá,

Vamos lá,

a) 9+5y = -91
5y=-91-9
5y=-100
y=-100/5
y=-20

b) -4+8y = -68
8y=-68+4
8y=-64
y=-64/8
y=-8

c) 4x+3+2x = -9
6x=-9-3
6x=-12
x=-12/6
x=-2

d) 4x-10+8x = 50
12x=50+10
12x=60
x=60/12
x=5

Answer 2

Olá!

a) 9+5y = -91
=> 5y=-91-9
=> 5y=-100
=> y=-100/5
=> y=-20

b) -4+8y = -68
=> 8y=-68+4
=> 8y=-64
=> y=-64/8
=> y=-8

c) 4x+3+2x = -9
=> 6x=-9-3
=> 6x=-12
=> x=-12/6
=> x=-2

d) 4x-10+8x = 50
=> 12x=50+10
=> 12x=60
=> x=60/12
=> x=5

Espero ter ajudado!