Question

Solve the equation for y. Then find the value of y for each value of x.

3x-7y=13;x= -3, 0, 3

Answer 1

When x is -3

`3\left(-3\right)-7y=13\quad :\quad y=-(22)/(7)\quad \left(\mathrm{Decimal}:\quad y=-3.14285\dots \right)`

When x is 0

`3\cdot \:0-7y=13\quad :\quad y=-(13)/(7)\quad \left(\mathrm{Decimal}:\quad y=-1.85714\dots \right)`

When x is 3

`3\cdot \:3-7y=13\quad :\quad y=-(4)/(7)\quad \left(\mathrm{Decimal}:\quad y=-0.57142\dots \right)`