Question

Solve the simultaneous equations
5
x
+
y
=
21
3
x
+
y
=
13

Answer 1

Step-by-step explanation:

5x+y=21 --------- (1)

3x+y=13 ----------(2)

step 1: (1)-(2)-----

5x+y-(3x+y)=21-13

5x+y-3x-y=8

2x=8

x=8/2

x=4

now ,putting the value in equation (1)----

5x+y=21

5*4+y=21

20+y= 21

y=21-20

y=1

so, x=4 and y=1

Hope you understand.

Answer 2

Step-by-step explanation:

5x+y=21 -------------(1)

3x+