Question

90 points! Can someone please explain what ie substitution in the work? I dont get it. My teacher is asking me to not substitute but I dont know what that is. I would really appreciate an answer!

Answer 1

x=5/11 | x=6, A

Explanation:

For the first question- 3(4-2x)=-x+1

Use algebra to solve

1. 3(4-2x)=-x+1 Distribute

2. 12-6x=-x+1 Seperate like terms

3. 12-1=6x-x Combine

4. 11=5x

5. x=5/11

For the second babysitting question, since we want to multiply the combined hours worked by 9 (the amount of money per hour, the equation should be A. Use algebra to find the hours.

1. 9(5+x)=99 Distribute

2. 45+9x=99

3. 9x=54

4. x=54/9

5. x=6