Question

MATEMÁTICA*

C) {y=-2x + 5
{2y=2x-7

D) {y = 2x-5
{y=x-1

uma resposta simples pfvr​

Answer 1

Resposta:

a)x=6 e y=5

y=x-1 (2) y=x-1

y=-2x+7 5=x-1

-------------- 5+1=x

y=2x-2 6=x

y=-2x+7

--------------

y=5

b)x=4 y=3

y=-2x+5 y=x-1

y=x-1 (2) 3=x-1

--------------- 3+1=x

y=-2x+5 4=x

y=2x-2

---------------

y=3

c)x=\frac{5}{2}

2

5

y=-2 y=2x-7

y=-2x+5 -2=2x-7

y=2x-7 -2+7=2x

y=-2 5=2x

x=\frac{5}{2}

2

5

d)x=-2 y=-3

y=2x-5 y=x-1

y=x-1 (-2) -3=x-1

------------- -3+1=x

y=2x-5 -2=x

y=-2x+2

--------------

y=-3