Answer:
Step-by-step explanation:
1) -3b and 4b are like terms
2) 10y and -9y are like terms
3) 14z - 27z = -13z
4)
[tex]\frac{7}{8}x-\frac{1}{2}x=\frac{7}{8}x-\frac{1*4}{2*4}x\\=\frac{7}{8}x-\frac{4}{8}x\\\\=\frac{7-4}{8}x=\frac{3}{8}x[/tex]
5)8+16r-9r = 8 + 7r
