7.5+k=10 7.5+k-7.5=10-7.5 step 1 k=2.5 step 2 find her mistake
a: step 1
b: step 2
c: no mistake

Ineed with this problem 21 show steps

What is always true when two whole numbers are subtracted?

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13