Question

1)4,2х+8,4=14,7 2)0,39:х-0,1=0,16

Answer 1

1)
4,2х+8,4=14,7
4,2x=14,7-8,4
4,2x=6,3
x=6,3:4,2
x=1,5
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2)
0,39:х-0,1=0,16
0,39:x=0,16+0,1
0,39:x=0,26
x=0,39:0,26
x=1,5

Answer 2

1) 4,2х=14,7-8,4
4,2х=6,3
х=6,3:4,2
х=1,5

2) 0,39:х=0,16+0,1
0,39:х=0,26
х=0,39:0,26
х=1,5

Answer 3

To solve these equations, we'll isolate the variable x in each equation. Here are the step-by-step solutions for both equations:

1. 4.2x + 8.4 = 14.7

Step 1: Subtract 8.4 from both sides to isolate the term with x on the left side of the equation:

4.2x = 14.7 - 8.4 4.2x = 6.3

Step 2: Now, divide both sides by 4.2 to solve for x:

x = 6.3 / 4.2 x = 1.5

So, the solution to the first equation is x = 1.5.

2. 0.39 / x - 0.1 = 0.16

Step 1: Add 0.1 to both sides to isolate the fraction with x on the left side:

0.39 / x = 0.16 + 0.1 0.39 / x = 0.26

Step 2: Now, multiply both sides by x to solve for x:

0.39 = 0.26x

Step 3: Finally, divide both sides by 0.26 to find the value of x:

x = 0.39 / 0.26 x ≈ 1.5

So, the solution to the second equation is x ≈ 1.5.