4. find the solution to each equation mentally.
a. 30+ a = 40
b. 500+ b = 200
c. -...
Mathematics, 07.01.2020 06:31, cerna
4. find the solution to each equation mentally.
a. 30+ a = 40
b. 500+ b = 200
c. -1+c= -2
d. d +3,567 = 0
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Answers: 2
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