Question

rezolvați ecuatiile : a(x+2)÷3=4 b)10×(2^3-2^2-2^0)÷x=1 c) (-2^2^3)=(2^2^3)× x d)-2x+10=-3
REPEDE AM NEVOIE VA ROG!!!​

Answer 1

Explicație pas cu pas:

a)

$(x + 2) : 3 = 4 \\ x + 2 = 4 \times 3 \\ x + 2 = 12 \\ x = 12 - 2 \\ x = 10$

b)

$10 \times ( {2}^{3} - {2}^{2} - {2}^{0} ) : x = 1 \\ 10 \times (8 - 4 - 1) = x \\ x = 10 \times 3 \\ x = 30$

c)

$( - {2}^{ {2}^{3} } ) = ( {2}^{ {2}^{3} } ) \times x \\ - {2}^{8} = {2}^{8} \times x \\ x = - {2}^{8} : {2}^{8} \\ x = - 1$

d)

$- 2x + 10 = - 3 \\ - 2x = - 3 - 10 \\ - 2x = - 13 \\ x = \frac{13}{2}$