Spencer can do a piece of work in 20 days and Toby in 25 days. They began to work together.
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Check the picture below. So let's use those two points on the line.
bearing in mind that the standard form is also a general form.
standard form for a linear equation means
• all coefficients must be integers, no fractions
• only the constant on the right-hand-side
• all variables on the left-hand-side, sorted
• "x" must not have a negative coefficient
