Question

Find the solution set of the equations x+y=50 (i) and 2x+3y=120 (ii) by method
of substitution.​

Answer 1

Answer:

x= 30, y=20

Step-by-step explanation:

x + y =50. 1 equation

2x + 3y = 120. 2 equation

Using substitution methods

taking equation 1

x + y = 50

x = 50 - y

put the x value in equation 2

2( 50-y) + 3y = 120

100 - 2y + 3y = 120

y = 120 -100

y = 20

put the y value in equation 1

x +20 = 50

x = 50 -20

x = 30