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9 votes
I NEED HELP!

-38x+43=-40x-57

User Raad
by
6.7k points

2 Answers

7 votes

Given equation,


\\ \dashrightarrow \sf \qquad-38x+43=-40x-57 \\ \\

Adding 40x to both sides :


\\ { \dashrightarrow \sf \qquad-38x+43 + 40x=-40x-57 + 40x} \\ \\


{ \dashrightarrow \sf \qquad2x+43=-57} \\ \\

Adding (-43) to both sides we get :


\\ { \dashrightarrow \sf \qquad2x+43 + ( - 43)=-57 + (- 43)} \\ \\


{ \dashrightarrow \sf \qquad2x= - 100} \\ \\

Dividing 2 from both sides :


\\ { \dashrightarrow \sf \qquad (2x)/(2) = - (100)/(2) } \\ \\


{ \dashrightarrow \tt \qquad \: x=-50} \\ \\

User Tomas Kohl
by
5.1k points
12 votes


x = - 50

-38×+43=-40×-57

-38×+43+40=-57

-38×+40×=-57-43

2×=-57+43

2×=-100

×=-50

I do not know if it's right

User W A Carnegie
by
6.3k points