Question

Solve the system by substitution 2.5x-3y=-13 3.25x-y=-14

Answer 1

Solve for the first variable in one equation then substitute the results into the other equation. (-4,1)

Answer 2

Answer:

$(-4,1)$

Step-by-step explanation:

we have

$2.5x-3y=-13$ -----> equation A

$3.25x-y=-14$ -----> isolate variable y

$y=3.25x+14$ ------> equation B

Substitute equation B in equation A

$2.5x-3[3.25x+14]=-13$

$2.5x-9.75x-42=-13$

$-7.25x=-13+42$

$-7.25x=29$

$x=-4$

Find the value of y

$y=3.25(-4)+14=1$

the solution is the point $(-4,1)$