X=-5/1=-5=-5.0
PREMISES
4x-3(2x+5)=-5
CALCULATIONS
4x-3(2x+5)=-5
Denoting the order of operations from left to right,
4x-6x-15=-5
Isolating the variable on the LHS,
-2x=-5+15
-2x=10
Solving,
-2x/-2=10/-2
x=10/-2
x=
-5/1=-5=-5.0
PROOF
If x=-5, then the mathematic sentence 4x-3(2x+5)=-5 brings
4(-5)-3[2(-5)+5]=-5
-20–3(-10+5)=-5
-20–3(-5)=-5
-20+15=-5 and
-5=-5 supports the solution x=-5 to the sentence
C.H.
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