6x+3y=54 2x+y=18 system of equation using substitution

, where R stands for all real numbers.

Step-by-step explanation:

Part 1: Solving one equation for its variable

First, we need to solve one of the equations for one of its variables. I will use the second equation.

  Subtract from both sides to isolate the .

Part 2: Substituting the solved variable value into the other equation

Now, simply substitute this value in the place of the in the first equation and solve for .

   Distribute the coefficient of the equation.

   Simplify the equation.

This answer is perfectly okay to get. This means that your equations have an infinite number of solutions.

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step-by-step explanation:

because i said it is

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.