Решить: 1) 0.6 х+1.8=02) 7-0.7 х=03) 0.3p-5=6-0.7p4) 8/31k-71=1.11k+1

1) 0.6 х+1.8=0

0.6 х=-1.8

х=-1.8/0.6

х=-3

2) 7-0.7 х=0

-0.7 х=-7

0.7 х=7

х=7/0.7

х=70/7

х=10

3) 0.3p-5=6-0.7p

0.3p+0.7p=6+5

1p=11

p=11/1

p=11

4) 8/31k-71=1.11k+1

8/31k-1.11k=1+71

8/31k-1.11k=72

(8-1.11*31) k/31 = (72*31) / 31

(8-1.11*31) k=72*31

(8-34.41) k=2232

-26.41k=2232

k=2232 / (-26.41)

k=-2232/26.41