Question

Please help (picture above)

Answer 1

x=9 y=45

Explanation:

y=4x + 9.......(1)

y= 5x.........(2)

Substitute 5x for y in equation 1.

5x= 4x + 9

5x - 4x = 9 (Collect like terms 5 and 4 have x in common if +4 crossover it changes to -4)

x = 9

substitute 9 for x in equation 2.

y = 5(9)

y = 5 x 9(multiplication)

y = 45

Answer 2

y= 45

x=9

Explanation:

plug 5x into y since y=5x:

5x=4x+9

-4. -4

x=9

5(9)=45