Solve the given system of equations by substitution
x - y = 2, 2x + y = 7

x=10/3, y=4/3. (10/3, 4/3).

Step-by-step explanation:

x-y=2

2x+y=7

x=y+2

2(y+2)+y=7

2y+4+y=8

3y+4=8

3y=8-4

3y=4

y=4/3

x-4/3=2

x=2+4/3

x=6/3+4/3=10/3

x=10/3, y=4/3.

-232

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.