Question

rezolvati ecuatiile
dau coroana!
promit❗​

Answer 1

Explicație pas cu pas:

$- 7x = 14 | \div ( - 7)| \\ x = - 2$

$x + 4 = 1 | - (4)| \\ x = 1 - 4 \\ x = - 3$

$x + 6 = 2 | - (6)| \\ x = 2 - 6 \\ x = - 4$

$x - 4 = - 9 | + (4)| \\ x = - 9 + 4 \\ x = - 5$

$18 \div ( - x) = 9 | \times ( - x)| \\ 18 = 9 \times ( - x) \\ 18 = - 9x | \div ( - 9)| \\ - 2 = x \\ x = - 2$

$x \div ( - 5) = 4 | \times ( - 5)| \\ x = 4 \times ( - 5) \\ x = - 20$

$20 \div x = - 5 | \times (x)| \\ 20 = - 5 \times x \\ 20 = - 5x | \div ( - 5)| \\ - 4 = x \\ x = - 4$

$2x - 5 = - 9 | + (5)| \\ 2x = - 9 + 5 \\ 2x = - 4 | \div (2)| \\ x = - 2$

$3x + 4 = - 5 | - (4)| \\ 3x = - 5 - 4 \\ 3x = - 9 | \div (3)| \\ x = - 3$