5x-4[7+(2x-4)], for x=-3 with shown work please
2 answers:
Answer: -3
Concept:
Here, we need to understand the idea of evaluation.
When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.
Solve:
<u>Given information</u>
x= -3
<u>Given expression</u>
5x - 4 [7 + (2x - 4)]
<u>Substitute x value into the expression</u>
=5(-3) - 4 [7 + (2(-3) - 4)]
<u>Simplify by multiplication</u>
=-15 - 4 [7 + (-6 - 4)]
<u>Simplify value in parentheses</u>
=-15 - 4 [7 + (-10)]
<u>Simplify value in bracket</u>
=-15 - 4 [-3]
<u>Simplify by multiplication</u>
=-15 - (-12)
=-15 + 12
=
Hope this helps!! :)
Please let me know if you have any questions
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If their perimeters are equal, we can add up all the side lengths of each triangle, and set the perimeters equal to each other to find the value of x that satisfies the equation:
x - 2 + x + 3x + 1 = 2x - 5 + x + 4 + 6x - 7
Combine like terms:
5x - 1 = 9x - 8
And finally, solve for x:
7 = 4x
x =
Therefore, x is equal to .
<em>Hope this helps! :)</em>