Question

Which of the values for x and y make the equation 3x + 4y + 6 = 26 true?

x = 4, y = 2
x = 5, y = 6
x = 4, y = 3
x = 3, y = 5

Answer 1

like a first step subtract from both sides 6

so what will get ?

Answer 2

You cannot solve this equation for x or y because there are two unknowns

go through each answer choice one at a time, plug in the x and y values, and see if the equation is still true (equal on both sides)