Question

calcule
a) a-14+18+10-15=-6

b)(+12)+a+(-9)+(+3)+(-13)+(+21)=0​

Answer 1

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$a-14+18+10-15=-6$

$a=-6+14-18-10+15$

$a=8-18-10+15$

$a=-10-10+15$

$a=-20+15$

$a=-5$

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$(+12)+a+(-9)+(+3)+(-13)+(+21)$

$12+a-9+3-13+21$

$a=-12+9-3+13-21$

$a=-3-3+13-21$

$a=-6+13-21$

$a=7-21$

$a=-14$

:::::::::Espero ter ajudado:::::::

Answer 2

a) a -14+18+10-15=-6

a=-6+15-10-18+14

a =-22+29

a = 7

b) (+12)+a+(-9)+(+3)+(-13)+(+21)=0

12+a-9+3-13+21=0

a=0-21+13-3+9-12

a=36+22

a=-14