Question

1) (18,678:2,2+0,222)•6,1-15,1432=? 2) 2,8х+4,7х+15=5010 3) 0,3х + 3,52) •3 = 13,26

Answer 1

вот 1 и 2 задания на листе, третье не до конца поместилось, поэтому напишу так. теперь строим уравнение:

0,9х + 10,56 = 13,26

0,9х = 13,26 - 10,56

0,9х = 2,76

х = 2,76/0,9

х = 0,30

Answer 2

Sure, I'd be happy to help you solve these equations step by step:

1. $(18,678:2) + (2+0.222) \cdot 6.1 - 15.1432$

First, let's perform the calculations inside the parentheses:

$(18.678:2) = 9.339$

$(2+0.222) = 2.222$

Now we substitute these values back into the equation:

$9.339 + 2.222 \cdot 6.1 - 15.1432$

Now, perform the multiplication:

$9.339 + 13.5642 - 15.1432$

Finally, perform the additions and subtractions:

$7.76$

So, the result of the first equation is approximately $7.76$.

2. $2.8x + 4.7x + 15 = 5010$

Combine the terms with $x$:

$7.5x + 15 = 5010$

Subtract 15 from both sides:

$7.5x = 4995$

Now, solve for $x$ by dividing both sides by 7.5:

$x = \frac{4995}{7.5} = 666$

So, the solution for the second equation is $x = 666$.

3. $0.3x + 3.52 \cdot 3 = 13.26$

First, perform the multiplication:

$3.52 \cdot 3 = 10.56$

Now, the equation becomes:

$0.3x + 10.56 = 13.26$

Subtract 10.56 from both sides:

$0.3x = 2.7$

Divide both sides by 0.3:

$x = \frac{2.7}{0.3} = 9$

So, the solution for the third equation is $x = 9$.