Решение на фото)))))))))))))))))))))))))))))))
6х + 1 - 3 + 2х = 14
8х - 2 = 14
8х = 14+2
8х = 16
х = 16 : 8
<span><em><u>х = 2</u></em></span>
<span>(2a-3b)(2a+3b) -4(a+3b)-3=</span>4a^2-9a^2-4a-12b-3
0,49^ (-1/2) = (49/100)^(-1/2) = (100/49)^(1/2) = √100/49 = 10/7