Question

resolva as equações :

a) 8×-9=2×+11

b)10-4×=9-2×

c)7×+5=68-2×​

Answer 1

Resposta:

a) 8×-9=2×+11

8x-2x=9+11

6x=20

x=20/6= 10/3

b)10-4×=9-2×

10-9=4x-2x

1=2x

x=1/2

c)7×+5=68-2×​

7x+2x=68-5

9x=63

x=63/9

x=7