Answer:
c+20=72
Step-by-step explanation:
Answer:
9r
Step-by-step explanation:
4r+9r-11r+7r
Combine like terms
13r -11r+7r
2r+7r
9r
Answer:
no solution
Step-by-step explanation:
-4(x+5)=-4x-30
-4x-20=-4x+30
no solution
x cancel
Put them into y=mx+b
y=1/3x -1
y=2/3x-4
Graph them. Where they touch is your answer. No touch? No solution. Same line? Infinite solutions.
Second set: Same thing.
Solution to first set is (9,2)