Question 162290
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Let {{{x=number}}}
1st condition: {{{7x}}}, seven times the number
2nd condition: {{{2x}}}, twice the number
3rd condition ---> ADD = 63 ---{{{system(7x,2x,63)}}}
Continuing,
{{{7x+2x=63}}}
{{{9x=63}}} ------> {{{cross(9)x/cross(9)=cross(63)7/cross(9)}}}
{{{x=7}}} ANSWER
Check via the 3 conditions ---->{{{7*7=49}}},{{{2*7=14}}}---Addition, 49+14=63
Thank you,
Jojo</pre>