Answer:
Step-by-step explanation:
Problem 5: answer (3,-2)
y=-2
4x-3y=18
Substitute y value of first equation (-2) into y value of 2nd equation
4x-3(-2)=18
4x+6=18
substract 6 on both sides to isolate x
4x+6-6=18-6
4x=12
x=3
Problem 6 answer (2,3)
Y=5x-7
-3x-2y=-12
Substitute value of y in first equation (5x-7) into value of y in second equation.
-3x-2(5x-7)=-12
-3x-10x+14=-12
-13x+14=-12
Add -14 to both sides to isolate x
-13x + 14-14=-12-14
-13x=-26
X=2
Solve for y by inserting x value (2) in either equation.
Y=5x-7
Y=5(2)-7
Y=10-7
Y=3
