Question

a-b-2c from 4a+2b-2c,​

Answer 1

Answer:

Subtracting a - b - 2c from 4a + 2b - 2c we get

$(4a + 2b - 2c) - (a - b - 2c)\\</p><p> = 4a + 2b - 2c - a + b + 2c\\</p><p> = (4 -1)a + (2 + 1)b + (2 - 2)c\\</p><p> = 3a + 3b\\</p><p> = 3(a + b)$