Question

Помигите решить!!!

4,8d+5,91+13,2d=150

(2,61-4x):0,03+4,6=90

Answer 1

4,8d+5,91+13,2d=150
18d=150-5.91
18d=144.09
d=144.09:18
d=8.005

(2,61-4x):0,03+4,6=90
(2.61-4х):0.03=90-4.6
(2.61-4х):0.03=85.4
2.61-4х=85.4*0.03
2.61-4х=2.562
-4х=2.562-2.61
-4х=-0.048
х=-0.048:(-4)
х=0.012