Question

(2.61-4х):0.03+4.6=90;  8.36-5.36:(0.2х+0.47х)=7.56

Answer 1

(2.61-4х):0.03+4.6=90;

 (2.61-4х):0.03=90-4,6

 (2.61-4х):0.03=85,5

2,61-4х=85,5*0,3

2,61-4х= 25,65

4х=2,61-25,65

4х= 23,04

х=23,04/4

х= 5,76

 

8.36-5.36:(0.2х+0.47х)=7.56

  5.36:(0.2х+0.47х)=8,36-7,56

  5.36:(0.2х+0.47х)= 0,8

 0.2х+0.47х=5,36/0,8

0,67х= 6,7

х=6,7/0,67

х= 10