[tex]27)9 \times 9 + b = 100[/tex]
[tex]81 + b = 100[/tex]
[tex]b = 100 - 81[/tex]
[tex]b = 19[/tex]
[tex]5 \times 10 + c = 67[/tex]
[tex]50 + c = 67[/tex]
[tex]c = 67 - 50[/tex]
[tex]c = 17[/tex]
[tex]c - 8 \times 7 = 26[/tex]
[tex]c - 56 = 26[/tex]
[tex]c = 26+ 56[/tex]
[tex]c = 82[/tex]
[tex]d - 9 \times 6 = 39[/tex]
[tex]d - 54 = 39[/tex]
[tex]d = 39 + 54[/tex]
[tex]d = 93[/tex]
[tex]a \div 2 \div 1 = 9[/tex]
[tex]a \div 2 = 9 \times 1[/tex]
[tex]a \div 2 = 9[/tex]
[tex]a = 9 \times 2[/tex]
[tex]a = 18[/tex]
[tex]b \times 10 - 0 = 10[/tex]
[tex]b \times 10 = 10 + 0[/tex]
[tex]b \times 10 = 10[/tex]
[tex]b = 10 \div 10[/tex]
[tex]b = 1[/tex]
[tex]28) \frac{n}{4} = 9 = > n= 9 \times 4 = > n = 36 [/tex]
[tex] \frac{p}{2} = 15 = > p = 2 \times 15 = > p = 30[/tex]
[tex]n + p = 36 + 30 = 66 [/tex]
[tex]66 \div 2 = 33 \: timbre \: are \: fiecare \: dupa \: impartire[/tex]
[tex]29)r + g = 22[/tex]
[tex]r = g + 6[/tex]
[tex]g + 6 + g = 22[/tex]
[tex]g + g = 22 - 6[/tex]
[tex]2g = 16[/tex]
[tex]g = 16 \div 2[/tex]
[tex]g = 8[/tex]
[tex]r = g + 6[/tex]
[tex]r = 8 + 6[/tex]
[tex]r = 14[/tex]
[tex]30)c = s + 4[/tex]
[tex]c + s = 16[/tex]
[tex]s + 4 + s = 16[/tex]
[tex]s + s = 16 - 4[/tex]
[tex]2s = 12[/tex]
[tex]s = 12 \div 2[/tex]
[tex]s = 6[/tex]
[tex]c = s + 4[/tex]
[tex]c = 6 + 4[/tex]
[tex]c = 10[/tex]
[tex]32)c = l \div 9[/tex]
[tex]c + l = 100[/tex]
[tex]l \div 9 + l = 100 \: | \times 9[/tex]
[tex]l + 9l = 900[/tex]
[tex]10l = 900[/tex]
[tex]l = 900 \div 10[/tex]
[tex]l = 90 \: kg[/tex]
[tex]33)x \times 5 + 24 = 44[/tex]
[tex]5x + 24 = 44[/tex]
[tex]5x = 44 - 24[/tex]
[tex]5x = 20[/tex]
[tex]x = 20 \div 5[/tex]
[tex]x = 4[/tex]
