3 x 29 = 87
By multiplying 87 and 49
cross-multiplying
The answer to the equation 8 x 48 is 384. You can calculate this by multiplying 8 by 48 directly.
To divide 87 by 3, you can perform the division directly: 87 ÷ 3 = 29. This means that when you divide 87 into three equal parts, each part is 29. You can also check your work by multiplying 29 by 3, which equals 87.
87 = 3yDivide each side of the equation by 3:29 = y
By multiplying 87 and 49
cross-multiplying
to simplify the equation
Francium has 87 protons, and mass numbers ranging from 199 to 232, with the longest lived isotopes having mass numbers of 221 to 223. There are different decay modes for the different isotopes, and without knowing the isotope, we cannot produce an equation.
Reciprocal. Except that dividing by a rational equation is much easier.
this is an example of β radiation, n -> p + e Rb-87 -> Sr-87 + e (rem to write atomic numbers in, Rb is 37 and Sr is 38) The halflife 87Rb is 4,88.1010 years.
87 = 3yDivide each side of the equation by 3:29 = y
2 x 41 = 82
When you multiply both sides by a negative number the inequality must be flipped over. You do not do that when multiplying by a positive number.
Any equation that requires division by four ninths.
That means that multiplying both sides of the equation by the same non-zero number is a valid operation, which often helps you simplify the equation.
by adding, subtracting, dividing, and multiplying.