7x=3y+45
4x+5y=19 what’s the answer and show work

x = 6 and y = -1

Step-by-step explanation:

It is given two equations,

7x = 3y + 45

⇒ 7x - 3y = 45    (1)

4x + 5y=19

⇒  4x + 5y = 19    (2)

To solve these equations

eq (1) * 4  ⇒   28x - 12y =180  (3)

eq (2) * 7 ⇒    28x + 35y = 133   (4)

eq(3) - eq(4) ⇒   0x - 47y = 47

y = -47/47 = -1

eq(1) ⇒ = 7x - 3*-1 = 45

7x + 3 = 45

7x = 45 - 3 = 42

x = 42/7 = 6

Therefore x = 6 and y = -1

3x + 4y -25 =0 represents the amount of change sianna should recieve