A linear equation in two variables is an equation in the form of ax+ by +c = 0 a x + b y + c = 0, where a,b a, b & c c are real numbers and the coefficients of x x and y y, i.e a a and b b are not equal to zero.
Cross multiplying proportions is a straightforward process that is the same as cross multiplying fractions. Cross multiply by multiplying a numerator by the other side's
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One plus one is two.