Answer:
1. y=4
y=x+7
4=x+7
x= -3 , y= 4
2. y=3x
y=x+5
3x=x+5
2x=5
x=5/2 or 2.5
y= 3(5/2)
y= 15/2 or 7.5
x= 2.5, 7= 7.5
Answer:
1. x= -3 2. x= 5/2
Step-by-step explanation:
You need to substitute the second y equation given into the first one to find x. Then get x by itself on one side.
1. 4= x + 7
-7 -7
-3 = x
x= -3
2. 3x= x + 5
-x -x
2x= 5
(2x= 5) /2
x= 5/2
