I'm assuming the question is for m6 +m7. Let's let m1 be represented by x. That means that m4 must be x+3. So, x+(x+3)=70. Use this equation to solve for x. Then substitute that answer into the equation that we can make if m6=x+5 and m7=x+6: m6+m7 would be (x+5)+(x+6) = ?
