Question

solve the equation
x+y = 3 and 2x +5y=13
by subsituton.​

Answer 1

Step-by-step explanation:

x+y=3

x=3-y put in other

2(3-y) +5y=13

6-2y+5y=13

y=7/3

So x=3-7/3 = 2/3

Answer 2

x+y=3 eq.1
2x+5y=13 eq.2
From equation 1
X=3-y
Put the value of x in equation 2.
2(3-y)+5y=13
6-2y+5y=13
6+3y=13
3y=13-6
Y= 7/3
Put the value of y in equation equation 1.
X+Y=3
X+7/3=3
X=3-7/3
X= (9-7)/3
X= 2/3
So, value of X is 2/3and Y is 7/3.

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