Question

Resolva as equações

Answer 1

f)

4(x-1)=20

4x-4=20

4x=20+4

4x=24

x=24/4

x=6

g)

3x²+1=49

3x²=49-1

3x²=48

x²=48/3

x²=16

x=+-√16

x=+-4

h)

5x-6=9

5x=9+6

5x=15

x=15/5

x=3.