ysabel0420
19.09.2020 •
Mathematics
Why are the properties of equality used? Select all that apply. a The properties of equality are used to solve an equation. b The properties of equality are used to write an equation. c The properties of equality are used to check the solution of an equation. d The properties of equality are used to keep an equation balanced. e The properties of equality are used to isolate the variable in an equation.
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Ответ:
2(5n+3)=8n+2(n+3) multiply number in front of parenthesis by every argument inside it.
2*5n+2*3=8n+2*n+2*3
10n+6=8n+2n+6
10n+6=10n+6
LHS=RSH, so it has infinitely many solutions. Every number can be n.