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Asap 1. if 7a+3b=20 and 3a+7b=10, then what is the value of a+b? 2. if 9x+2y^2−3z^2=132 and 9y−2y^2+3z^2=867, then x+y = 3. if 9x+2y^2−3z^2=132 and 9y−2y^2+3z^2=867, then x-y =
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Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?
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Asap 1. if 7a+3b=20 and 3a+7b=10, then what is the value of a+b? 2. if 9x+2y^2−3z^2=132 and 9y−2y^2...
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