Question

Va rog, exercițiul 1! Dau coroana!

Answer 1

$a) \: x = - 7 - 21 \\ x = - 28 \\ b) \: - x = 30 - 12 \\ - x = 18 | \times ( - 1) \\ x = - 18 \\ c) \: \frac{x}{2 } = \frac{4}{3} + 3 \\ \frac{x}{2} = \frac{4}{3} + \frac{9}{3} \\ \frac{x}{2} = \frac{13}{3} \\ x = \frac{13}{3} \times 2 \\ x = \frac{26}{3} \\ d) \: \frac{34}{10} + x = \frac{1}{5} \\ x = \frac{1}{5} - \frac{34}{10} \\ x = \frac{2 - 34}{10} \\ x = - \frac{32}{10} \\ x = - \frac{16}{5} \\ e) \: x = - \frac{148}{12} \\ x = - \frac{37}{3} \\ f) \: x = - 5 \div ( - \frac{3}{4} ) \\ x = - 5 \times ( - \frac{4}{3} ) \\ x = \frac{20}{4} \\ x = 5 \\ g) \: - \frac{31}{10} x = 62 \\ x = 62 \times ( - \frac{10}{31} ) \\ x = 2 \times ( - 10) \\ x = - 20$
$a) \: x = - 7 - 21 \\ x = - 28 \\ b) \: - x = 30 - 12 \\ - x = 18 | \times ( - 1) \\ x = - 18 \\ c) \: \frac{x}{2 } = \frac{4}{3} + 3 \\ \frac{x}{2} = \frac{4}{3} + \frac{9}{3} \\ \frac{x}{2} = \frac{13}{3} \\ x = \frac{13}{3} \times 2 \\ x = \frac{26}{3} \\ d) \: \frac{34}{10} + x = \frac{1}{5} \\ x = \frac{1}{5} - \frac{34}{10} \\ x = \frac{2 - 34}{10} \\ x = - \frac{32}{10} \\ x = - \frac{16}{5} \\ e) \: x = - \frac{148}{12} \\ x = - \frac{37}{3} \\ f) \: x = - 5 \div ( - \frac{3}{4} ) \\ x = - 5 \times ( - \frac{4}{3} ) \\ x = \frac{20}{4} \\ x = 5 \\ g) \: - \frac{31}{10} x = 62 \\ x = 62 \times ( - \frac{10}{31} ) \\ x = 2 \times ( - 10) \\ x = - 20 \\ h) \: \frac{48}{10} x = \frac{ 36}{10} \\ x = \frac{36}{10} \times \frac{10}{48} \\ x = \frac{3}{4} \\ i) \: x = 7 \times ( - 3) \\x = - 21 \\ j) \: x + 2 = - 2 \times 4 \\ x + 2 = - 8 \\ x = - 8 - 2 \\ x = - 10 \\ k) \: x = 0 \div ( - 3) \\ x = 0 \\ l) \: x = \frac{3}{2} \times ( - \frac{1}{15} ) \\ x = - \frac{1}{10}$