To find the value of x in the equation 7x + 2y = 48 when y = 3, we first substitute the value of y into the equation.
Substituting y:
7x + 2(3) = 48
This simplifies to:
7x + 6 = 48
Next, we need to isolate 7x. We do this by subtracting 6 from both sides:
7x = 48 – 6
7x = 42
Now, to solve for x, we divide both sides by 7:
x = 42 / 7
This simplifies to:
x = 6
So, the value of x when y = 3 is 6.