Question

1) Resolver las siguientes ecuaciones.
a) 9+7×-3-4×= 27
b) 8×-7+×=5×-21
c) ײ-5= 59
d) √x+2=7
e) x³+75=200
urg!!​

Answer 1

Respuesta:

$9 + 7x - 3 - 4x = 27$

$9 + 7x - 3 - 4x - 27 = 0$

$- 21 + 3x = 0$

$3x = 21$

$x = \frac{21}{3}$

$x = 7$

$8x-7+x=5x-21$

$8x - 7 - + x - 5x + 21 = 0$

$4x + 14 = 0$

$4x = - 14$

$x = \frac{ - 14}{4}$

$x = \frac{ - 7}{2}$

$x²-5= 59$

${x}^{2} = 59 + 5$

${x}^{2} = 64$

$\sqrt{ {x}^{2} } = \sqrt{64}$

$x = 8$

$\sqrt{x + 2} = 7$

${ \sqrt{x + 2} }^{2} = {7}^{2}$

$x + 2 = 49$

$x = 49 - 2$

$x = 47$

$x³+75=200$

${x}^{3} = 200 - 75$

${x}^{3} = 125$

$\sqrt[3]{ {x}^{3} } = \sqrt[3]{125}$

$x = 5$