Question

-8z+(4.5)+3.5z+7y-1.5

Answer 1

• 
  `\boxed{\sf{7y+3-4.5z}}`

Explanation:

In order to combine like terms, you have to isolate x and y from one side of the equation.

`\sf{-8z+\left(4.5\right)+3.5z+7y-1.5}`

First, thing you do is remove parentheses.

`\Longrightarrow: \sf{-8z+4.5+3.5z+7y-1.5}`

Solve.

Then, you combine like terms.

`\Longrightarrow:\sf{-8z+3.5z+7y+4.5-1.5}`

Add/subtract the numbers from left to right.

-8z+3.5z=-4.5z

Rewrite the problem down.

`\Longrightarrow: \sf{-4.5z+7y+4.5-1.5}`

Solve.

4.5-1.5=3

`\Longrightarrow: \boxed{\sf{7y+3-4.5z}}`

• Therefore, the correct answer is 7y+3-4.5z.

I hope this helps, let me know if you have any questions.