Răspuns :
1) (3a-7)+(4-a) =2a-3
2) (5x-8)+(7-2x)= 3x-1
3)(8b+12)+(2-5b)= 3b+14
4)(6y-9)-(5-3y)= 9y-14
2) (5x-8)+(7-2x)= 3x-1
3)(8b+12)+(2-5b)= 3b+14
4)(6y-9)-(5-3y)= 9y-14
1. (3a-7)+(4-a) =2a-3
2. (5x-8)+(7-2x)= 3x-1
3. (8b+12)+(2-5b)= 3b+14
4. (6y-9)-(5-3y)= 9y-14
2. (5x-8)+(7-2x)= 3x-1
3. (8b+12)+(2-5b)= 3b+14
4. (6y-9)-(5-3y)= 9y-14