Question

Whats the exspression equivalent to (-2x + 8.1y)

Answer 1

b. 7x + 2.8y

Explanation:

distribute the negative sign:

= -2x + 8.1 + -1(-9x + 5.3y)

= -2x + 8.1 + -1(-9x) + -1(5.3y)

= -2x + 8.1 +9x + -5.3y

combine like terms:

= (-2x + 9x) + (8.1 + -5.3y)

= 7x + 2.8y