Question

solve 3x+4y=10 and 2x-2y=2​

Answer 1

Answer:

x=2 & y=1

Step-by-step explanation:

3x+4y=10

=>x=(10-4y)/3

=put in second equation

=>2(10-4y)/3 -2y=2

=>20-8y-6y=6

=>20-6=14y

=>14=14y

=>y=1

put in 1st eq we get

3x+4=10

=>x=2

Answer 2

Answer: x= 2 and y = 1

Step-by-step explanation:

Given,

3x + 4y = 10        ........(I)

and 2x - 2y = 2    i.e., 4x - 4y = 4    .........(II)

adding equation (I) and (II), we get

3x + 4y + 4x - 4y = 10 + 4

⇒ 7x = 14

⇒ x = 2

substituting x = 2 in equation (I), we get

3(2) + 4y = 10

⇒ 6 + 4y = 10

⇒ 4y = 4

⇒ y = 1