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Q: By what number should you multiply the first equation to solve using elimintation -2x-4y equals 22 -6x plus 3y equals 21?

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There is no need. The first equation can be rearranged to a simple equation in just y. Multiply it by 0.2 to solve for y. Substitute the value of y in the second equation and rearrange to get a simple equation in x. Multiply by (1/6) to find x.

When you multiply a number by itself it equals the number in question to the power of two. For example, 4x4=16, but 4^2 also equals 16.

15 and -4

That word "equals" in there makes it an equation.

For the equation 80% of what number equals 40, the unknown number is 50.

Factors are the numbers you multiply together. For example, in the equation 2 times 3 equals 6, the 2 and the 3 are both factors of 6.

it equals the same number you multiply it by

(+)(+)=(+) (-)(-)=(+) (-)(+)=(-) (+)(-)=(-) This is all.

The property is: If equals are subtracted from equals, the results are equal.

9

In this case, the equation is balanced.

Number density.

To determine what 25 percent of a number is, multiply the number by 0.25

you multiply each number by number

Answer is 411 Logic: You multiply the two numbers in LHS of the equation and reverse the result to form the first two digits of RHS and for the 3rd digit you subtract one from the 2nd number on the LHS of the equation.

A "balanced" equation.

4800 you can just multiply 150x32

1x21 7x3

3x+2 = 8

first you need to know the number of liters and moles and the equation. you do someting then multiply the liters times the moles. first you need to know the number of liters and moles and the equation. you do someting then multiply the liters times the moles.

4

Any time that a negative number is being multipled by another negative number, it equals a positive number. In this case, -1 multiplied by -1 equals 1. Another example of this is -5 multiplied by -5 which equals 25. Though if you multiply a negative by a positve, it equals a negative. If you were to multiply a positive by a positve, it will always equal a positve.

1 inch equals 2.54 centimeters, so multiply the number of inches by 2.54. 1 centimeter equals about .39 inches, so multiply the number of centimeters by .39.

Given 20 and 50%, multiply 20 by 0.5, which equals 10. Given 70 and 30%, multiply 70 by 0.3, which equals 21. Or if you prefer, given 20 and 50%, multiply 2 by 5, which equals 10. Or if you prefer, given 70 and 30%, multiply 7 by 3, which equals 21.

positivetimes negative equals negative neg. times neg. equals pos. pos.pos. equals pos.