Question

1) 1 836:(26-7у)=102 2) 450:(25+5х)=15 3)3 900:(10+15х)=30 4 )12х+2х+54+8*2

Answer 1

1) 1836:(26-7у)=102
26-7у=1836:102
26-7у=18
7у=18+26
7у=44
У =короче не знаю

Answer 2

To solve the given equations, I'll break them down one by one:

1. $1,836:(26-7y) = 102$

To solve for y, first, we need to isolate the variable y on one side of the equation. Let's do the steps:

$1,836 = 102 \times (26 - 7y)$

Now, divide both sides by 102:

$\frac{1,836}{102} = 26 - 7y$

Simplify the left side:

$18 = 26 - 7y$

Next, isolate y by moving the constant term to the other side:

$-7y = 18 - 26$

Simplify:

$-7y = -8$

Finally, divide by -7 to find the value of y:

$y = \frac{-8}{-7} = \frac{8}{7}$

So, the value of y is $y = \frac{8}{7}$.

2. $450:(25+5x) = 15$

To solve for x, follow these steps:

$450 = 15 \times (25 + 5x)$

Divide both sides by 15:

$\frac{450}{15} = 25 + 5x$

Simplify the left side:

$30 = 25 + 5x$

Now, isolate x by moving the constant term to the other side:

$5x = 30 - 25$

Simplify:

$5x = 5$

Finally, divide by 5 to find the value of x:

$x = \frac{5}{5} = 1$

So, the value of x is $x = 1$.

3. $3,900:(10+15x) = 30$

Let's solve for x step by step:

$3,900 = 30 \times (10 + 15x)$

Divide both sides by 30:

$\frac{3,900}{30} = 10 + 15x$

Simplify the left side:

$130 = 10 + 15x$

Now, isolate x by moving the constant term to the other side:

$15x = 130 - 10$

Simplify:

$15x = 120$

Finally, divide by 15 to find the value of x:

$x = \frac{120}{15} = 8$

So, the value of x is $x = 8$.

4. $12x + 2x + 54 + 8 \times 2$

Simply calculate the expression:

$12x + 2x + 54 + 8 \times 2 = 14x + 54 + 16 = 14x + 70$

So, the simplified expression is $14x + 70$.