Question

resolver em z as seguintes equações
A) a + 1 = 8

B) 3p + 17 = -4

C) x + 2x - 5 = 3x + 9
...........-------....---------
...............3..........3

D) 5 . ( 2 x - 3 ) -2 . ( 4 -3x ) = 4x + 1

Answer 1

$A)\ a + 1 = 8 \to \\\\a=8-1\to \\\\a=7\\\\\\\\\\B)\ 3p + 17 = -4\to \\\\3p=-4-17\to \\\\3p=-21\to \\\\p=- \dfrac{21}{3} \to \\\\ p=-7$




$C)\ x+ \frac{2x-5}{3} = \frac{3x+9}{3} \to mmc=3\\\\ 3x+2x-5=3x-9\to \\\\3x+2x-3x=-9+5\to \\\\2x=-4\to \\\\x=- \frac{4}{2} \to\\\\ x=-2$




$D) 5 . ( 2 x - 3 ) -2 . ( 4 -3x ) = 4x + 1\to \\\\ 10x-15-8+6x=4x+1\to\\\\ 10x+6x-4x=1+15+8\to \\\\ 12x=24\to \\\\ x= \frac{24}{12} \to \\\\ x=2$