Answer:
4
Explanation:
One:
13y+2-2y=10y+3-y
* first step is to simplify (combine like terms) *
11y+2=9y+3
* Subtract 2 from both sides (you want like terms on the same side) *
11y = 9y + 1
* Subtract 9y from both sides (again you want like terms on the same side) *
2y = 1
* Divide through by 1 *
y = 1/2
Two:
9(3y+7)-2=3(-9y+9)
* Simplify (combine like terms) *
27y+61=-27y+27
* Subtract 27 from both sides*
27y+34=-27y
* Subtract 27y from both sides*
34=-54y
* Divide through by 34 *
y = -17/27
Three:
32.1y+3.1+2.4y-8.2=34.5y-5.1
* Simplify (combine like terms) *
34.5y-5.1=34.5y-5.1
* From here you can see that all real numbers would work *
All real numbers
Four:
5(2.2y+3.4)=5(y-2)+6y
* Simplify (combine like terms) *
11y+17=11y-10
* The 11y s would cancel leaving you with no solution*
No solution