Question

Y=7x + 10 y=-4x – 23

Answer 1

That's two lines; presumably we want the meet.

7x + 10 = -4x - 23

11 x = -33

x = -3

y = 7x + 10= -11

Answer: x=-3, y=-11

check:

-4(-3)-23 = 12-23 = -11, good

Answer 2

Answer:

x = -3

y = -11

Step-by-step explanation:

to solve this linear equation using substitution method

let us say  that

y=7x + 10.........................................................equation 1

y= -4x – 23...................................................... equation2

substitute equation  1 into equation 2

7x + 10 = -4x - 23

collect the like terms

7x + 4x = -23 -10

11x =  -33

divide both sides by the coefficient of x which is 11

11x/11 = -33/11

x = -3

put the value of x = -3 into equation 2

y= -4x – 23...................................................... equation2

y = -4(-3) - 23

y = 12 - 23

y = -11

therefore the value of x and y is -3 and -11 respectively