Posted by **Mary ** on Friday, May 2, 2014 at 10:13pm.

solve the equations

21E-7=0

I came up with 0.33

am I right or wrong

- algebra -
**Reiny**, Friday, May 2, 2014 at 10:19pm
easy way to tell, just sub it in

Left Side= 21E-7

= 21(.33) - 7

= .07

≠ 0

so , no, you are wrong

21E - 7 = 0

21E = 7

E = 7/21 = 1/3 as the accurate answer.

1/3 = .3333.... , not .33

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