Question

1)8,31х-71=1,11х+1
2)0,3n-5=6-0,7n

Answer 1

1)8.31x-71=1.11x+1
8.31x-1.11x=1+71
7.2x=72
x=72/7.2
x=10
2)0.3n-5=6-0.7n
0.3n+0.7n=6+5
1n=11
n=11

Answer 2

8,31x-1,11x=1+71
7,2x=72
x= 72:7.2
X=10

0.3n+0,7n=6-5
n=1