Ответ:
Решение:
1) 5 + 4x = 6 + 3x
\( 4x - 3x = 6 - 5 \)
\( x = 1 \)
2) 5x - 3 = 3x + 1
\( 5x - 3x = 1 + 3 \)
\( 2x = 4 \)
\( x = 2 \)
3) -8 + 2x = x - 5
\( 2x - x = -5 + 8 \)
\( x = 3 \)
4) 9 - 3x = 1 + x
\( -3x - x = 1 - 9 \)
\( -4x = -8 \)
\( x = 2 \)
5) 6x - 7 = 8 + 3x
\( 6x - 3x = 8 + 7 \)
\( 3x = 15 \)
\( x = 5 \)
6) 4x - 2 = 10 + 2x
\( 4x - 2x = 10 + 2 \)
\( 2x = 12 \)
\( x = 6 \)
7) 3 - 4x = 17 - 6x
\( -4x + 6x = 17 - 3 \)
\( 2x = 14 \)
\( x = 7 \)
8) 9x - 1 = 8x + 7
\( 9x - 8x = 7 + 1 \)
\( x = 8 \)
9) 4x - 6 = 2x + 12
\( 4x - 2x = 12 + 6 \)
\( 2x = 18 \)
\( x = 9 \)
10) 3x + 3 = 2x + 13
\( 3x - 2x = 13 - 3 \)
\( x = 10 \)
11) 9 - 3x = 20 - 4x
\( -3x + 4x = 20 - 9 \)
\( x = 11 \)
12) 7x - 1 = 5x + 23
\( 7x - 5x = 23 + 1 \)
\( 2x = 24 \)
\( x = 12 \)
13) 2 - 3x = 28 - 5x
\( -3x + 5x = 28 - 2 \)
\( 2x = 26 \)
\( x = 13 \)
14) 6x + 3 = 5x + 17
\( 6x - 5x = 17 - 3 \)
\( x = 14 \)
15) 8x - 10 = 6x + 20
\( 8x - 6x = 20 + 10 \)
\( 2x = 30 \)
\( x = 15 \)
16) 17x - 1 = 15 + 16x
\( 17x - 16x = 15 + 1 \)
\( x = 16 \)
17) 19 + 3x = 5x - 15
\( 3x - 5x = -15 - 19 \)
\( -2x = -34 \)
\( x = 17 \)
18) 6 + 2x = 4x - 30
\( 2x - 4x = -30 - 6 \)
\( -2x = -36 \)
\( x = 18 \)
19) 5x + 3 = 4x + 22
\( 5x - 4x = 22 - 3 \)
\( x = 19 \)
20) 2 + 2x = x + 24
\( 2x - x = 24 - 2 \)
\( x = 22 \)
21) 5 + 7x = 26 + 6x
\( 7x - 6x = 26 - 5 \)
\( x = 21 \)
Ответ: 1) 1; 2) 2; 3) 3; 4) 2; 5) 5; 6) 6; 7) 7; 8) 8; 9) 9; 10) 10; 11) 11; 12) 12; 13) 13; 14) 14; 15) 15; 16) 16; 17) 17; 18) 18; 19) 19; 20) 22; 21) 21.
