Упростите выражение 1)45х+16х 2)68у-13у 3)х+75х 4)32х-18х 5)76у+43у 6)54х-х 7)15х+7х-3х 8)21у+9у-5у 9)33х+17х-9х

1)45х+16х = (45+16)x= 61x;

2)68у-13у = (68-13)y = 55y;

3)х+75х = 1x+75x = 76x;

4)32х-18х = (32-18)x= 14x;

5)76у+43у = (76+43)y= 119y;

6)54х-х = 54x - 1x = 53x;

7)15х+7х-3х = (15+7-3)x = 19x;

8)21у+9у-5у = (21+9-5)y = 25y;

9)33х+17х-9х = (33+17-9)x = 41x.