Question

8. Use substitution to see if x = 5 is the correct solution to 5x - 7 = -3x + 23
A. yes
B. no
9. Use substitution to determine if x = -1 is the solution to 4(3 - x) + 5 = 2x - 7x + 16
A. yes
B. no

Answer 1

just substitute the numbers and check

Answer 2

Substitution means that you plug in the number instead of the variable, try to do that after getting all the x's on one side, you will get the same answer but it will make solving easier. Good lucl.

Answer 3

thank you