4x-y=17, -2x+3y=-26 systems of equations by substitution

x=2.5

y= -7

Step-by-step explanation:

1.)make y the subject of any equation

4x-y=17

-y=17 -4x

y = -17 + 4x

2.)substitute it in the next equation

-2x + 3(-17 + 4x)= -26

-2x -51 + 12x = -26

-2x + 12x - 51= -26

10x -51= -26

10x = 25

x = 2.5

3.) substitute the x- value into any equation

4x -y = 17

4(2.5)- y = 17

10 - y =17

-y = 7

y = -7

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

57.09 minus 7.0435 equals

step-by-step explanation:

just subtrach them both and u get the answer of 50.0465