Question

resolver as seguintes Equações (calcular o valor de x)


A)
$2 \times + 1 = 4 \times - 7$
B)
$9 \times + 9 + 3 \times = 15$

B)
$16 \times - 1 = 12 \times + 3$

D)
$3 \times - 2 = 4 \times + 9$

E)
$5 \times - 3 + \times = 2 \times + 9$

F)
$17 \times - 7 \times = \times + 18$
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Answer 1

Resposta:

$A)\\ 2x+1=4x-7\\ 2x-4x=-7-1\\ -2x=-8~~~\times(-1)\\ 2x=8\\ x={8\over2}\\ x=4\\ --------------------\\ B)\\ 9x+9+3x=15\\ 12x=15-9\\ 12x=6\\ \\ x={6\over12}={1\over2}\\ ----------------------\\ C)\\ 16x-1=12x+3\\ 16x-12x=3+1\\ 4x=4\\ x=4\div4\\ x=1\\ -------------------\\ D)\\ 3x-2=4x+9\\ 3x-4x=9+2\\ -x=11~~~\times(-1)\\ \\ x=-11$