given
[tex]20 \times \frac{1}{2} + \: - 50 \times \frac{3}{4} [/tex]
negative × positive = negative
therefore the equation is written as
[tex]20 \times \frac{1}{2} - 50 \times \frac{3}{4} [/tex]
20÷2 =10
50÷4 = 25/2
now the general equation is
[tex]10 - \frac{25 \times 3}{4} [/tex]
[tex] = 10 - \frac{75}{4} [/tex]
now we find the L.C.M by multiplying the denominators which is 4×1 = 4 as the L. C. M,
now multiply through by the L . C .M which is 4
[tex] = 4 \times 10 - 4 \times \frac{75}{4} [/tex]
[tex] = 40 - 75[/tex]
[tex] = - 35[/tex]
as our final answer.
