Answer:
The answer is B) 1
Step-by-step explanation:
x-2y=5 x-3y=7
+2y=+2y
x-0=5+2y
x=5+2y
This problem says x is 5+2y, so substitute 5+2y for x in the other problem:
x-3y=7 1. Put 5+2y in place of the x:
(5+2y)-3y=7 2. Now, remove the parenthesis:
5+2y-3y=7 3. Combine the y's:
5-y= 7 (2y-3y=-y) 4. Solve for y:
-5 =-5
0-y= 2
- (1)y= 2
-1
y=-2
5. Now that you know y is -2, you can put it in your problems to solve for x:
x-3y=7 x-2y=5
x-3(-2)=7 x-2(-2)=5
x+6= 7 x+4= 5
-6=-6 -4=-4
x=1 x=1
