a)
[tex]100 + 35 = 135 \\ \\ 70 - 100 \\ x - 135 \\ \\x = \frac{70 \times 135}{100} = \frac{7 \times 135}{10} = \frac{7 \times 27}{2} = \\ = \frac{189}{2} = 94.5[/tex]
b)
[tex]100 - 45 = 55 \\ \\ 70 - 100\% \\ x - 55\% \\ \\ x = \frac{70 \times 55}{100} = \frac{7 \times 55}{10} = \frac{7 \times 11}{2} = \\ = \frac{77}{2} = 38.5[/tex]
c)
[tex]127 - 100\% \\ x - 7\% \\ \\ x = \frac{127 \times 7}{100} = \frac{889}{100} = 8.89 \\ \\ 127 + 8.89 = 135.89[/tex]
d)
[tex]100 - 8 = 92 \\ \\ 1350 - 100 \\x - 92 \\ \\ x = \frac{1350 \times 92}{100} = \frac{135 \times 92}{10} = \\ = \frac{135 \times 46}{5} = \frac{27 \times 46}{1} = 1242[/tex]
Myślę że pomogłem ;)
