Question

2)3х/5=6+х/3 3)х/3+х/5=8 4)у/3+у/4=14 решите уравнения​

Answer 1

Решение:

1.

$\frac{3x}{5} = 6+\frac{x}{3} |*15\\9x = 90 + 5x\\9x-5x=90\\4x=90\\x=\frac{45}{2}$

2.

$\frac{x}{3} +\frac{x}{5} =8 |*15\\5x+3x=120\\8x=120\\x=15$

3.

$\frac{y}{3} +\frac{y}{4} =14 |*12\\4y+3y=168\\7y=168\\y=24$

Answer 2

Объяснение:

$\frac{3x}{5} = 6 + \frac{x}{3} \\ 9x = 90 + 5x \\ 4x = 90 \\ x = 90 \div 4 \\ x = 22.5$

$\frac{x}{3} + \frac{x}{5} = 8 \\ 5x + 3x = 120 \\ 8x = 120 \\ x = 120 \div 8 \\ x = 15$

$\frac{y}{3} + \frac{y}{4} = 14 \\ 4y + 3y = 98 \\ 7y = 98 \\ y = 98 \div 7 \\ y = 14$