Question

halla el valor de la incronica
a) 5 + 2 (× - 4) =6× - 9
b7(× + 8) = -7
c)5 (2× -5)= -25​

Answer 1

$5 + 2(x - 4) = 6x - 9 \\ 5 + 2x - 8 = 6x - 9 \\ 5 - 8 + 9 = 6x - 2x \\ 4x = 6 \\ x = 6 \div 4 \\ x = 1.5$

$7(x + 8) = - 7 \\ x + 8 = - 1 \\ x = - 1 - 8 \\ x = - 9$

$5(2x - 5) = - 25 \\ 2x - 5 = - 5 \\ 2x = - 5 + 5 \\ 2x = 0 \\ x = 0$