Question

130×4+130×х=910 памогите даю 10баллов пж срочн

Answer 1

130(4+x)=910
x+4=910:130
x+4=7
x=3

Answer 2

520+ х130=910
х130=910-520
х130=390
х=390:130
х=3Ответ:3

Answer 3

To solve the equation 130x4 + 130x = 910, we can simplify the left side of the equation by factoring out the common factor of 130:

130x4 + 130x = 130(x4 + x)

Now we can set this expression equal to 910 and solve for x:

130(x4 + x) = 910

Divide both sides by 130:

x4 + x = 7

Rearrange the terms:

x4 + x - 7 = 0

This is now a quadratic equation in the variable x, so we can use the quadratic formula to solve for x:

x = (-b ± √(b^2 - 4ac)) / 2a

where a = 1, b = 1, and c = -7.

Substituting these values, we get:

x = (-1 ± √(1^2 - 4(1)(-7))) / 2(1)

Simplifying:

x = (-1 ± √29) / 2

Therefore, there are two possible solutions for x:

x ≈ 1.791 or x ≈ -2.791

Since we can't have a negative number of items, the only valid solution is x ≈ 1.791.

Therefore, if we substitute this value back into the original equation, we get:

130x4 + 130x = 130(1.791)4 + 130(1.791) ≈ 910

So the solution is x ≈ 1.791.