Astudent solves the equation x+3/2 = 3x+5/5 using the steps in the table. which method of solving for the variable could be used instead of cross multiplication? distributing x + 3 and then 3x + 5 to both sides of the equation distributing x – 3 and then 3x – 5 to both sides of the equation using the multiplication property of equality to multiply both sides of the equation by 10 using the multiplication property of equality to multiply both sides of the equation by 1/10

C

Step-by-step explanation:

The given equation is:

Cross multiplication would have given us

..................(Equation 1)

Now, if we use the multiplication property of equality to multiply both sides of the equation by 10, we will get:

This will become , which is the same as (Equation 1) which we had got from cross multiplication.

Thus, out of the given options, the third option, "using the multiplication property of equality to multiply both sides of the equation by 10" is the correct one.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb