Question

Решить уравнения: 1)t+2,5t-1=0,5t+2; 2)1,3v+18=2v-16+v; 3)x+0,2x-8=8-0,4x

Answer 1

1)t+2,5t-1=0,5t+2;

3t=3

t=1

2)1,3v+18=2v-16+v;

-1,7v=-34

v=20

3)x+0,2x-8=8-0,4x

1,6x=16

x=10

Answer 2

1. t+2,5t-1=0,5t+2

3,5t-1=0,5t+2

3,5t-0,5t=2+1

3t=3

t=1

2. 1,3v+18=2v-16+v

1,3v+18=3v-16

1,3v-3v=-16-18

-1,7v=-34

v=20

3. x+0,2x-8=8-0,4x

1,2x-8=8-0,4x

1,2x+0,4x=8+8

1,6x=16

x=10