Question

Find the sum of 4x + 5y + 7 ; - 5x – y - 3; and 3x – 3y +2.

Answer 1

Answer:

2x+y+5 is the answer by solving

Answer 2

1. 4x + 5y + 7 ; - 5x - y - 3 and 3x - 3y + 2

Answer:

2x + 9y + 6

Step-by-step explanation:

= 4x + 5y + 7 - 5x - y - 3 + 3x - 3y + 2

= 4x - 5x + 3x + 5y + 5y - y - 3y + 7 - 3 + 2

= 2x + 9y + 6

In the first we have to remove brackets. Since here there is no brackets we are simply going to the next step. And also we have to put the plus symbol instead of ';' symbol.

Secondly we have to gather all the like terms (which means those terms which have the same variables ex: 5x, 3x, 78x etc...)

Thirdly we have to simplify them all using this reference :

+ + = + (add)

- - = - (add)

+ - = > (put the greater symbol) (sub)

- + = > (put the greater symbol) (sub)