Question

Help Please
Applications for systems of equations
A test Worth 100 points and having 28 problems is broken down into 3-point problems and 4-point problems. How many of each type of problem will be on the test?

Answer 1

$\left \{ {{x+y=28} \atop {4x+3y=100}} \right. \left \{ {{x=28-y} \atop {4(28-y)+3y=100}} \right. 112-y=100, 12=y,  x=16, y=12$