3 years ago

Sole for the indicated variable. ax+r=7, for x

Mathematics

1 answer:

nasty-shy [4]3 years ago

8 0

ax+r=7

Move ax to the other side. +positive ax changes to -negative ax

ax-ax+r=7-ax

r=7-ax

Answer: r=7-ax or r=-ax+7 ( same thing) but rearranged

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In the 3rd step, you should add 16 instead of subtracting 16

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Consider the equation 2(ax+3)=4x−3(4x+8). For what value of a is there no solution to the equation?

erastovalidia [21]

Answer:

the value of $a$ such that there is no solution to the equation is $a = -4$ .

Step-by-step explanation:

Let first simplify the expression presented on statement. The equation has no solution if and only if $a$ is eliminated in the process and an absurd is the result (i.e. $0 = 7$ ).

$2\cdot (a\cdot x + 3) = 4\cdot x -3\cdot (4\cdot x + 8)$

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To obtain an absurd, we need that $a+4 = 0$ . Hence, the value of $a$ such that there is no solution to the equation is:

$a = -4$

Let prove the certainty of the result. We find that an absurd exist: ( $a = -4$ )

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