explanation: 7=-3z+7 move the -3z to the other side of the equation by adding -3z from both sides 7+3z=7 subtract 7 from both sides 3z=7 divide both sides by 3 z=0
you can check your answer by plugging in the answer into the equation .. 7=-3(0)+7 which gives you 7=7 so the answer is correct z=0
