\(=\frac{75}{100}x1+\frac{75}{100}x29+\frac{75}{100}x30+\frac{75}{100}x40\)
\(=\frac{75}{100}x\left(1+29+30+40\right)\)
\(=\frac{75}{100}x100\)
\(=75\)
75/100 + 3/4 x 29 + 75/100 x 30 + 0,75 x 40
= 0,75 x 1 + 0,75 x 29 + 0,75 x 30 + 0,75 x 40
= 0,75 x ( 1 + 29 + 30 + 40 )
= 0,75 x 100
= 75