<h2>(3x+4)+2(3x+4)=117</h2>
<h2>= (3x+4)+(6x+8)=117</h2><h2>= 3x+4+6x+8=117</h2><h2>= 9x+12=117</h2><h2>= 9x = 117-12 </h2><h2>= 9x = 105</h2><h2>= x =105 ÷ 9</h2><h2>= x = 11.6666666667</h2>
<h2>Hence,x = 11.6666666667</h2>
Answer:
Well i mean i know i am is college but i have not learned it yet. sorry :(
Step-by-step explanation:
Using the formulaA=a+b2hSolving forhh=2Aa+b=2·1400 20+50=40cm
Let us take number of $5 bills = x and
number of $10 bills = y.
Give that "number of $10 bills is twice the number of $5 bills".
So, y is twice of x,
We can setup an equation.
y= 2x ............................... equation(1)
Total value of all bills = $125.
We can setup another equation,
5*(number of $5 bills) + 10*(number of $10 bills) =125.
5(x) +10(y) = 125 ................................... equation(2)
Plugging y=2x in equation(2), we get
5(x) +10(2x) = 125 .
5x+20x = 125.
Adding like terms
25x = 125
Dividing both sides by 25.
25x /25 = 125/25
x= 5.
Plugging x=5 in first equation, we get
y= 2(5) = 10.
Therefore, number of number of $5 bills=5 bills and number of $10 bills = 10 bills.
Since <span><span>2x,</span><span>2x</span></span> does not contain the variable to solve for, move it to the right side of the equation by subtracting <span><span>2x,</span><span>2x</span></span> from both sides.<span><span><span>−y</span>=<span><span><span>−2</span>x</span>+9</span></span><span><span>-y</span>=<span><span><span>-2</span>x</span>+9</span></span></span>Multiply each one <span><span><span>−y</span>=<span><span><span>−2</span>x</span>+9</span></span><span><span>-y</span>=<span><span><span>-2</span>x</span>+9</span></span></span> by <span><span>−1</span><span>-1</span></span>Multiply each one in <span><span><span>−y</span>=<span><span><span>−2</span>x</span>+9</span></span><span><span>-y</span>=<span><span><span>-2</span>x</span>+9</span></span></span> by <span><span>−1</span><span>-1</span></span>.<span><span><span><span>−y</span>⋅<span>−1</span></span>=<span><span><span><span>−2</span>x</span>⋅<span>−1</span></span>+<span>9⋅<span>−1</span></span></span></span><span><span><span>-y</span>⋅<span>-1</span></span>=<span><span><span><span>-2</span>x</span>⋅<span>-1</span></span>+<span>9⋅<span>-1</span></span></span></span></span>make it simple <span><span><span>−y</span>⋅<span>−1</span></span><span><span>-y</span>⋅<span>-1</span></span></span>.Multiply some more. <span><span>−1</span><span>-1</span></span> by <span><span>−1</span><span>-1</span></span> to get <span>11</span>.<span><span><span>1y</span>=<span><span><span><span>−2</span>x</span>⋅<span>−1</span></span>+<span>9⋅<span>−1</span></span></span></span><span><span>1y</span>=<span><span><span><span>-2</span>x</span>⋅<span>-1</span></span>+<span>9⋅<span>-1</span></span></span></span></span>Multiply <span>yy</span> by <span>11</span> to get <span>yy</span>.(but Y?)<span><span>y=<span><span><span><span>−2</span>x</span>⋅<span>−1</span></span>+<span>9⋅<span>−1</span></span></span></span><span>y=<span><span><span><span>-2</span>x</span>⋅<span>-1</span></span>+<span>9⋅<span>-1</span></span></span></span></span>Simplify each stuff that you simplify. Multiply...again..... <span><span>−1</span><span>-1</span></span> by <span><span>−2</span><span>-2</span></span> to get <span>22</span>.<span><span>y=<span><span>2x</span>+<span>9⋅<span>−1</span></span></span></span><span>y=<span><span>2x</span>+<span>9⋅<span>-1</span></span></span></span></span>Multiply some more..... <span>99</span> by <span><span>−1</span><span>-1</span></span> to get <span><span>−9</span><span>-9</span></span>.<span>y=<span><span>2x</span><span>−<span>9.</span></span></span></span>