Question Which is the best first step and explanation for solving this system of equations? 3x+y=7 x+y=3
Answer: x = 2 and y = 1 Step-by-step explanation: Given equations are : 3x+y=7 ….(1) x+y=3 ….(2) Subtract equation (1) and (2) we get : 3x+y-(x+y) = 7-3 3x+y-x-y = 4 3x-x = 4 2x = 4 x = 2 Now put the value of x in equation (2) 2+y=3 y=3-2 y = 1 Hence, the solution of the equations are x = 2 and y = 1. Log in to Reply
Answer:
x = 2 and y = 1
Step-by-step explanation:
Given equations are :
3x+y=7 ….(1)
x+y=3 ….(2)
Subtract equation (1) and (2) we get :
3x+y-(x+y) = 7-3
3x+y-x-y = 4
3x-x = 4
2x = 4
x = 2
Now put the value of x in equation (2)
2+y=3
y=3-2
y = 1
Hence, the solution of the equations are x = 2 and y = 1.