MATH SOLVE

4 months ago

Q:
# d) Use the method of elimination and substitute the values found in the system of equations: 2π₯+2π¦=13 8π₯+3π¦=27

Accepted Solution

A:
$$2x+2y=13,8x+3y=27$$

$$8\times 2x+8\times 2y=8\times 13,2\times 8x+2\times 3y=2\times 27$$

$$16x+16y=104,16x+6y=54$$

$$16x-16x+16y-6y=104-54$$

$$16y-6y=104-54$$

$$10y=104-54$$

$$10y=50$$

$$y=5$$

$$8x+3\times 5=27$$

$$8x+15=27$$

$$8x=12$$

$$x=\frac{3}{2}$$

$$x=\frac{3}{2},y=5$$