Question

Subtract the second expression from the first:

−2b + 2c, b + 3c

Answer 1

(−2b + 2c) + (b + 3c)

= −2b + 2c − b − 3c

= −2b − b + 2c − 3c

= −3b − c

Answer 2

Write the subtraction

(−2b + 2c) − (b + 3c)

Distribute the − across the second expression:

−2b + 2c − b − 3c

Combine the b-terms: −2b − b = −3b

Combine the c-terms: 2c − 3c = −c

Write the result −3b − c

−3b − c