Вариант 3. Найди значение x. 1. 5x + 7 = 2x + 19; x = 2. 6x - 3 = 3x + 9; x = 3. 7x + 5 = x - 1; x = 4. 4x + 8 = 2x - 2; x = 5. 8x - 1 = 5x + 8; x = 6. 9x + 4 = 6x - 5; x = 7. 3x + 6 = x - 2; x = 8. 2x - 7 = 5x - 1; x = 9. 6x + 9 = 2x - 7; x = 10. 7x - 8 = 3x + 4; x = 11. 5x + 10 = 4x - 6; x = 12. 8x + 12 = 6x - 4; x =

Question

Accepted Answer

\( 5x + 7 = 2x + 19 \)
\( 5x - 2x = 19 - 7 \)
\( 3x = 12 \)
\( x = \frac{12}{3} \)
\( x = 4 \)
\( 6x - 3 = 3x + 9 \)
\( 6x - 3x = 9 + 3 \)
\( 3x = 12 \)
\( x = \frac{12}{3} \)
\( x = 4 \)
\( 7x + 5 = x - 1 \)
\( 7x - x = -1 - 5 \)
\( 6x = -6 \)
\( x = \frac{-6}{6} \)
\( x = -1 \)
\( 4x + 8 = 2x - 2 \)
\( 4x - 2x = -2 - 8 \)
\( 2x = -10 \)
\( x = \frac{-10}{2} \)
\( x = -5 \)
\( 8x - 1 = 5x + 8 \)
\( 8x - 5x = 8 + 1 \)
\( 3x = 9 \)
\( x = \frac{9}{3} \)
\( x = 3 \)
\( 9x + 4 = 6x - 5 \)
\( 9x - 6x = -5 - 4 \)
\( 3x = -9 \)
\( x = \frac{-9}{3} \)
\( x = -3 \)
\( 3x + 6 = x - 2 \)
\( 3x - x = -2 - 6 \)
\( 2x = -8 \)
\( x = \frac{-8}{2} \)
\( x = -4 \)
\( 2x - 7 = 5x - 1 \)
\( -7 + 1 = 5x - 2x \)
\( -6 = 3x \)
\( x = \frac{-6}{3} \)
\( x = -2 \)
\( 6x + 9 = 2x - 7 \)
\( 6x - 2x = -7 - 9 \)
\( 4x = -16 \)
\( x = \frac{-16}{4} \)
\( x = -4 \)
\( 7x - 8 = 3x + 4 \)
\( 7x - 3x = 4 + 8 \)
\( 4x = 12 \)
\( x = \frac{12}{4} \)
\( x = 3 \)
\( 5x + 10 = 4x - 6 \)
\( 5x - 4x = -6 - 10 \)
\( x = -16 \)
\( 8x + 12 = 6x - 4 \)
\( 8x - 6x = -4 - 12 \)
\( 2x = -16 \)
\( x = \frac{-16}{2} \)
\( x = -8 \)

Ответ: 1. x = 4; 2. x = 4; 3. x = -1; 4. x = -5; 5. x = 3; 6. x = -3; 7. x = -4; 8. x = -2; 9. x = -4; 10. x = 3; 11. x = -16; 12. x = -8.