Mathematics, 19.10.2020 21:01, haileyhale5

Which is the best first step when solving the following system of equations? 50+40= 10
30+ 2d=16
Multiply the first equation by -2.
Solve for d in the second equation.
O Solve for c in the first equation.
O Multiply the second equation by -2.

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Which is the best first step when solving the following system of equations? 50+40= 10
30+ 2d...