Question

Am nevoie de ajutor la acest ex.vă rog.Dau coroană și 30 de puncte.Răspunsurile aiurea (spam) sunt strict interzise.​

Answer 1

$a) \: 8x + 1 = 5x - 5 \\ 8x - 5x = - 5 - 1 \\ 3x = - 6 \\ x = - 6 \div 3 \\ x = - 2$

$b) \: - 4x + 10 = 10 - 2x \\ - 4x + 2x = 10 - 10 \\ - 2x = 0 \\ x = 0 \div ( - 2) \\ x = 0$

$c) \: - 3x + 5 = - 9x + 4x \\ - 3x + 9x - 4x = - 5 \\ 2x = - 5 \\ x = - \frac{ 5}{2}$

$d) \: 2(x + 1) = 6 \\ 2x + 2 = 6 \\ 2x = 6 - 2 \\ 2x = 4 \\ x = 4 \div 2 \\ x = 2$

$e) \: 5(x - 1) = 2x + 7 \\ 5x - 5 = 2x + 7 \\ 5x - 2x = 7 + 5 \\ 3x = 12 \\ x = 12 \div 3 \\ x = 4$

$f ) \: 3(x + 2) = 2(x + 4) \\ 3x + 6 = 2x + 8 \\3 x - 2x = 8 - 6 \\ x = 2$

$g) \: 6 = 4(x + 1) - 2(x + 2) \\ 6 = 4x \: + \not4 - 2x \: - \not 4 \\ 4x - 2x = 6 \\ 2x = 6 \\ x = 6 \div 2 \\ x = 3$

$h) \: 4 = 5(x + 1) - 6 \\ 4 = 5x + 5 - 6 \\ 5x - 1 = 4 \\ 5x = 4 + 1 \\ 5x = 5 \\ x = 5 \div 5 \\ x = 1$

$i) \: 3(2x - 5) = 6(x - 1) - 9 \\ 6x - 15 = 6x - 6 - 9 \\ 6x - 15 = 6x - 15 \\ 6x - 6x = - 15 + 15 \implies \O$