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Question

Помогите решить уравненияе)5x+21=3x+35f)17-3x+7x=31-2x+10g)2x-12=2(10-7x)h)5x-12-2(x-1)=3(5-2x)+4x

Answer 1

Ответ:

Пошаговое объяснение:

e) 5x + 21 = 3x + 35;

5x-3x = 35 - 21;

2x = 14;

x = 14 / 2;

x = 7;

f) 17 - 3x + 7x = 31 - 2x + 10;

-3x + 7x + 2x = 31 + 10 - 17;

6x = 24;

x = 24 / 6;

x = 4;

g) 2x - 12 = 2(10 - 7x);

2x - 12 = 20 - 14x;

2x + 14x = 20 + 12;

16x = 32;

x = 32 / 16;

x = 2;

h) 5x - 12 - 2(x - 1) = 3(5 - 2x) + 4x;

5x - 12 - 2x + 2 = 15 - 6x + 4x;

5x - 2x + 6x - 4x = 15 + 12 - 2;

5x = 25;

x = 25 / 5;

x = 5.

Answer 2

Е)5x+21=3x+35
5х-3х=35-21
2х=14|÷2
х=7

f)17-3x+7x=31-2x+10
-3х+7х+2х=41-17
6х=24|÷6
х=4

g)2x-12=2(10-7x)
2х -12=20-14х
2х+14х=20+12
16х=32|÷16
х=2

h)5x-12-2(x-1)=3(5-2x)+4x
5х-12-2х+2=15-6х+4х
5х-2х+6х-4х=15+12-2
5х=25|÷5
х=5.