Answer: B (4, 8)
Explanation:
6x + 3y=48
5x+y= 28
these functions are lines. "Solving a system of questions" means to find the point where they intersect, where the x's are the same and the y's are the same.
You want to multiply an entire equation to eliminate a variable.
6x + 3y=48
5x+y= 28
6x + 3y=48 multiply the 2nd equation by -3 so you can eliminate the y's
-3(5x+y= 28) multiply all terms by -3
6x + 3y=48
-15x-3y= -84 add like terms of the equations and the y goes away
-9x = -36 divide both sides by -9 to solve for x
x=4 now substitute back into one of the original equations
5(4)+y=28
20+y28
y=8
x=4, y=8
(4, 8) is your point where they intersect.