Question

Part 1: Simplifying Expressions by

Problem 1: Describe Caleb's mistake, then simplify the expression
Caleb's Work
5-3x+11-9x
16-6x
10×

Whats calebs mistake

Answer 1

The first person is right

Answer 2

Caleb's mistake is that instead of adding -3x and -9x to get to -12x, he made an error that got him -6x instead. He also subtracted 16 - 6x, you can't subtract a number from a number that has a variable.

`5-3x+11-9x`

`5+11-3x-9x`

`16 - 12x`