Question

For each expression, write an equivalent expression that uses only addition. Do not include any spaces in your answers. Keep the terms in the same order. 20−9+8−7 and 4x−7y−5z+6

Answer 1

Answer:

(a)$20+(-9)+8+(-7)$

(b)$4x+(-7y)+(-5z)+6$

Step-by-step explanation:

We are required to write an equivalent expression that uses only addition for each of the given term.

Note that the product of + and - is always -.

Therefore:

(a)20−9+8−7

$20-9+8-7 \\=20+(-9)+8+(-7)$

(b)4x−7y−5z+6

$4x-7y-5z+6\\=4x+(-7y)+(-5z)+6$