Examples
Solving 3x + 7 = 2x − 5
A linear equation on the board: the unknown gathered on one side, the answer found, then both sides checked with it.
- 0:48
- Maths problems
- Narrated by Erinome
- English
Made from a prompt
Solve for x: 3x + 7 = 2x − 5
Video transcript
In this video, we solve a linear equation by collecting the unknown on one side.
Question one. Solve for x: three x plus seven equals two x minus five.
Let us solve it. First, subtract two x from both sides to get x plus seven equals negative five.
Now subtract seven from both sides, so x equals negative twelve. To check, the left side becomes three times negative twelve plus seven, which equals negative twenty-nine.
The right side becomes two times negative twelve minus five, which also equals negative twenty-nine.
Both sides agree, confirming the solution. Hence, x equals negative twelve.
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