Question

решите номер 6 пожалуйста

Answer 1

4x + 3 = 2a - 1                             3x + 7 = a + 2
4x = 2a - 1 - 3                              3x = a + 2 - 7
4x = 2a - 4                                   3x = a - 5
x = 1/2a - 1                                  x = 1/3a - 5/3
$\frac{1}{2} a-1= \frac{1}{3}a - \frac{5}{3}\\\\ \frac{1}{2}a- \frac{1}{3}a=1-1 \frac{2}{3}\\\\ \frac{3}{6} a- \frac{2}{6} a=- \frac{2}{3}\\\\ \frac{1}{6}a=- \frac{2}{3}\\\\a=-4$

Answer 2

4x+3=2a-1
4x+4=2a
2x+2=a
x=(a-2)/2 =a/2 -1

3x+7=a+2
3x+5=a
3x=a-5
x=(a-5)/3=a/3-5/3

a/2-1=a/3 - 5/3
a/2-a/3=1-5/3
(3a-2a)/6 = -2/3
a/6=-2/3
a=-2/3*6=-4