Question

Fill in the blank:
(vii) $4a+3b–7a+4b=..\dots$

Answer 1

Solution:
4𝑎+3𝑏−7𝑎+4𝑏
= (4𝑎−7𝑎)+(3𝑏+4𝑏)
= (4−7)𝑎+(3+4)𝑏
= −3𝑎+7𝑏
Hence, the answer is −3𝑎+7𝑏