Question

упростить выражение: 1. 9x-3)+(x-5)-(7-3x); 2. -2(m-3)-(3m-5); 3. 4(2a(2a-1)+(7-5a) ;4. 2m-4m+5m; 5. 4x-8y-6x+11y; 6. 3m-2n; 7. -1.3a+4a-3.7a

Answer 1

1. (9x-3)+(x-5)-(7-3x)=9x-3+x-5-7+3x=13x-15
2. - 2(m-3)-(3m-5)=-2m+6-3m+5=-5m+11
4. 2m-4m+5m=3m
5. 4x-8y-6x+11y=2x+3y
6. 3m-2n
7. - 1.3a+4a-3.7a=-1a