Add: 7+10*1/2+14+.....+84.
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7+10=17*
17*1/2=17/2
17/2+14=45/2
45/2+x=84
x=84÷45/2
reciprocal of 45/2 =2/45 and due to reciprocal sign (÷)become (*)
so..x=84*2/45
x=168/45
x=3.733
17*1/2=17/2
17/2+14=45/2
45/2+x=84
x=84÷45/2
reciprocal of 45/2 =2/45 and due to reciprocal sign (÷)become (*)
so..x=84*2/45
x=168/45
x=3.733
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