Answer:
1.) 17.15
2.)112
3.)99
I think these are right
Step-by-step explanation:
Combine like terms.
2x+20=3x-5
20=3x-5-2x
20+5=3x-2x
25=x
X+y=10, x=10-y
4(10-y)+6y=332
solve the next parts yourself
Substitution is to use one variable to express another variable in order to eliminate one variable in the original equation
Plug in 0.9 for x
-(x) + 2.7
- (0.9) + 2.7
simplify
2.7 - 0.9 = 1.8
1.8 is your answer
hope this helps