Question

Resolva a equação abaixo:

9 (5x+20) = 8 (5x-35)


Determine o VALOR de "X" :

7 (2x-8) = 5 (2x-124)


8 (5x+120)= 6 (5x-15)​

Answer 1

Explicação passo-a-passo:

9 (5x+20) = 8 (5x-35)

45x+180 = 40x - 280

45x-40x= -280-180

5x = -460

x= -460/5

x= -92

7 (2x-8) = 5 (2x-124)

14x-56= 10x - 620

14x-10x= -620+56

4x= -564

X= -564/4

x= - 141

8 (5x+120)= 6 (5x-15)

40x + 960 = 30x - 90

40x - 30x = -90 -960

10x = -1050

x= -1050/10

X = -105