What equation means that 7 less than twice a number is -1?

Question

Apr 6, 2018

#2n-7=-1#

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Answer 1 · 2018-04-06T14:35:01

Let the number be #x#. So, ATQ, the required equation is

#2(x) - 7 = -1#

#2x = 6#

Therefore,

#x = 3#

1 step
Twice a number is #2 xx x#

2 step
#7# less than means #2xx x - 7#

3 step
Finally, now the equation is

#2x - 7 = -1#