4x+8=7.2+5x , What Is The Value Of x?

Mathematics

2 answers:

Neko [114]3 years ago

4 0

Answer: x=0.8

Step-by-step explanation: Solve for x by simplifying both sides of the equation, then isolating the variable.

Ymorist [56]3 years ago

3 0

Answer: -0.8

Hope this helps

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Trava [24]

$\left \{ {{4x-3y=16\:(I)} \atop {-2x+4y=-2\:(II)}} \right.$

Multiply the 2nd equation by (-4). This will eliminate the x's when you add the two new equations together.
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$\left \{ {{\diagup\!\!\!\!4x-3y=16} \atop {-\diagup\!\!\!\!4x+8y=-4}} \right.$
--------------------
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$\boxed{\boxed{y = \frac{12}{5}}}\end{array}}\qquad\quad\checkmark$

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$\frac{20x}{\diagup\!\!\!\!5} - \frac{36}{\diagup\!\!\!\!5} = \frac{80}{\diagup\!\!\!\!5}$
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