х+5)=3·7+3·5 2)4(х+9)=4·6+4·9 3)11(х+8)=11·5+11·8 4)33(х-2)=33·4-33·2

Question

Математика: х+5)=3·7+3·5 2)4(х+9)=4·6+4·9 3)11(х+8)=11·5+11·8 4)33(х-2)=33·4-33·2

karabanovaann · Answer

1) 3(х + 5) = 3 * 7 + 3 * 5 2) 4(х + 9) = 4 * 6 + 4 * 9

3(х + 5) = 3(7 + 5) 4(х + 9) = 4(6 + 9)

х = 7 х = 6

3) 11(х + 8) = 11 * 5 + 11 * 8 4) 33(х - 2) = 33 * 4 - 33 * 2

11(х + 8) = 11(5 + 8) 33(х - 2) = 33(4 - 2)

х = 5 х = 4