solve for n. 0.3 (5-n)=0.4 -0.2(n-7)
0.3 (5-n)=0.4 -0.2(n-7)Distribute: 1.5 - 0.3n = 0.4 - 0.2n + 1.4Combine: -0.3 = 0.1nDivide: -3 = n
