Question

1) x+23-19+48= -50

2)3.x - 27 - 21 + 84 = 12

 

Answer 1

\(1)x+23-19+48=-50\)

\(\Rightarrow x+23-19=-50-48\)

\(\Rightarrow x+23-19=-98\)

\(\Rightarrow x+23=-98+19\)

\(\Rightarrow x+23=-79\)

\(\Rightarrow x=-79-23=-102\)

\(2)3x-27-21+84=12\)

\(\Rightarrow3x-27-21=12-84\)

\(\Rightarrow3x-27-21=12+(-84)\)

\(\Rightarrow3x-27-21=-72\)

\(\Rightarrow3x-27=-72+21\)

\(\Rightarrow3x-27=-51\)

\(\Rightarrow3x=-51+27\)

\(\Rightarrow3x=-24\)

\(\Rightarrow x=-24\div3=-8\)

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Answer 2

\(a,x+23-19+48=-50\)

\(\Rightarrow x=-50-23+19-48\)

\(\Rightarrow x=-102\)

Answer 3

\(3x-27-21+84=12\)

\(3x=12-84+21+27\)

\(\Leftrightarrow3x=-24\)

\(\Leftrightarrow x=-8\)

Answer 4

\(1.x+23-19+48=-50\)

\(\Leftrightarrow x+4=-50-48\)

\(\Leftrightarrow x+4=-98\)

\(\Leftrightarrow x=-98-4\)

\(\Leftrightarrow x=-102\)

\(\text{Vậy }x=-102\)

\(2.3x-27-21+84=12\)

\(\Leftrightarrow3x-48=12-84\)

\(\Leftrightarrow3x-48=-72\)

\(\Leftrightarrow3x=-72+48\)

\(\Leftrightarrow3x=-24\)

\(\Leftrightarrow x=-24\div3\)

\(\Leftrightarrow x=-8\)

\(\text{Vậy }x=-8\)