Heather has 62 homework problems to complete by tomorrow. She completed 21 of them at school. Write and solve a subtraction equation to represent the number of problems she still
has to do.

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11