Answer:
x = 6, y = -1.
Step-by-step explanation:
7x = 3y + 45
4x + 5y = 19.... (1)
Rearranging the first equation:
7x - 3y = 45-----(2)
Multiply equation (1) by 3 and equation (2) by 5:
12x + 15y = 57
35x - 15y = 225
Adding :
47x + 0 = 282
x = 282 / 47 = 6.
To find the value of y substitute x = 6 into equation (2):
7(6) -3y = 45
-3y = 45 - 42 = 3
y = 3/-3 = -1.
Answer:
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
