Question

Which one could be a solution for the equation 3x+4y = 38 ?

• A. 3,4
• B. 6,5
• C. 2,19
• D. 3,12

Answer 1

The correct option is B

6,5

The solutions of a linear equation should satisfy the equation.

Substitute x = 3 and y = 4 in the given equation
3(3) + 4(4) = 25 $\ne$ 38 $\to$ its not a solution.

Substitute x = 6 and y = 5 in the given equation
3(6) + 4(5) = 38 $\to$ its a solution.

Substitute x = 2 and y = 19 in the given equation
3(2) + 4(19) = 82$\ne$ 38 $\to$ its not a solution.

Substitute x = 3 and y = 12 in the given equation
3(3) + 4(12) = 57 $\ne$ 38 $\to$ its not a solution.