Question 9
Simplify the following algebraic expressions.
a) $1-r+\frac{2s}{5}-3s+2r$
b) $\frac{2y^2}{3}+4-y^2+2y$
c) $4pq+2p-3pq-2q$
d) $d+8d-4d:3$
e) $10k^2:2k+5k-12k:4$
**Editorial note for this self-study exercise:** Read : as division, carried out before addition and subtraction. In (e), the divisor of the first quotient is 2k, and k is nonzero. Give all five simplified expressions; equivalent algebraic forms will be marked manually.
a) $1-r+\frac{2s}{5}-3s+2r$
b) $\frac{2y^2}{3}+4-y^2+2y$
c) $4pq+2p-3pq-2q$
d) $d+8d-4d:3$
e) $10k^2:2k+5k-12k:4$
**Editorial note for this self-study exercise:** Read : as division, carried out before addition and subtraction. In (e), the divisor of the first quotient is 2k, and k is nonzero. Give all five simplified expressions; equivalent algebraic forms will be marked manually.