solve the system of equations.
12x−5y=−20
y=x+4

x=

y=
plz

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

a.for lorena 14 hours makes $126   for 16 hours she makes 144

for julie 6 hours makes $72 for 21 hours its $252

b. julie makes more money than lorena julie makes $12 an hour and lorena makes $9  

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