for this question, you know what is x and you wanna find the y. So the only thing you should do is to put 3 for x and solve the equation: 3 + y = 10 y = 10 -3 y = 7
Hey, Hardq! The problem already gave us x. So we plug it in. 3+y=10 We now want to make the variable by itself, so we subtract 3 to the other side. y=10-3 Simple Math y=7 I hope this helps;)
