What value of × is in the solution set of -5×-15>10+20×

Mathematics

1 answer:

vazorg [7]3 years ago

5 0

Answer: $x$

Step-by-step explanation:

$-5x-15>10+20x$

Subtract 20x

$-5x-20x-15>10$

add 15

$-5x-20x>10+15$

Combine like terms

$-25x>25\\$

Divide by -25 (NOTE: When dividing or multiplying by negative numbers the inequality sign flips.)

$x$

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Solve the equation 3/4x+3-2x = -1/4+1/2x+5

elena55 [62]

Hi there! The answer is x = -1

Let's solve this equation step by step!
$\frac{3}{4} x + 3 - 2x = - \frac{1}{4} + \frac{1}{2} x + 5$

First collect terms.
$- 1 \frac{1}{4} x + 3 = \frac{1}{2} x + 4 \frac{3}{4}$

Subtract (1/2)x from both sides.
$- 1\frac{3}{4} x + 3 = 4 \frac{3}{4}$

Subtract 3 from both sides.
$- 1\frac{3}{4} x = 1 \frac{3}{4}$

And finally divide by -1 3/4
$x = \frac{7}{4} \div - \frac{7}{4} = \frac{7}{4} \times - \frac{4}{7} = - \frac{28}{28} = - 1$