Question

2x/3+x/5=6
2x+3/8-x/3=-5x/2+x
me ajude ​
pelo menos uma !

Answer 1

Explicação passo-a-passo:

.

$\dfrac{2x}{3} + \dfrac{x}{5} = 6$

$10x + 3x = 90$

$13x = 90$

$x = \dfrac{90}{13}$

.

2x+3/8-x/3=-5x/2+x

2x+3/8-x/3+5x/2+x=0

3(2+x)(2x+3)-8x(2+x)+120x/24(2+x)=0

(6+3x)(2x+3)-16x-8x²-120x/24(2+x)=0

12x+18+6x²+9x-16x-8x²+120x/24(2+x)=0

125x+18-2x²/24(2+x)=0

125+18-2x²=0

-2x²+125x+8=0

2x²-125x-18=0

x=-(-125)±√(-125)²-4×2×-18/2×2

x=125±√15625+144/4

x=125±√15763/4

x¹=125+√15763/4

x²=125-√15763/4