5-1

(a)  

(4a+5)+(3a-1)

(a)  

(2x+5)+(3x-7)

(a)  

(5x-9)+(x-9)

(a)  

3x+(1-4x)

(a)  

(-2a+7)+(3a-6)

(a)  

(7x-5)+(-9x+5)

(a)  

(9a+7)-(2a+3)

(a)  

(6x-3)-(4x+5)

(a)  

(a+3)-(2a+1)

(a)  

(-2b-9)-(b+2)

(a)  

(5a-4)-(4-3a)

(a)  

(x-4)-(-2x-3)

(a)  

-x-8と4x+2の和を求めなさい

(a)  

7x-3から2x-3をひいた差を求めなさい。

(a)