Question

Solve the system by substitution. -4.5-2y=-12.5 , 3.35x-y=-0.75

Answer 1

so -2y=-12.5+4.5 thus -2y=-8 thus y=4 if y=4 than 3.35x=-.75+4 thus 3.35x=3.25 thus x=3.35/3.25

Answer 2

First, we solve for y in the first equation:

`-2y = -12.5 +4.5`

`-2y=-8`

`y= (8)/(2)`

`y=4`
Then, we substitute the y value in the other equation and solve for x:

`3.35x-(4)=-0.75`

`3.35x=-0.75+4`

`3.35x=3.25`

`x= (3.25)/(3.35)`

`x= (65)/(67)`