Question

Select all equations that are also equivalent to 0.6 + 15b + 4 = 25.6. • Equation A: 15b + 4 = 25.6 • Equation B: 15b + 4 = 25 • Equation C: 3 (0.6 + 15b + 4 ) = 76.8 • Equation D: 15b = 25.6 • Equation E: 15b = 21

Answer 1

Equation $B$ and equation $D$ are equivalent to the equation $0.6 + 15b + 4 = 25.6$

$0.6 + 15b + 4 = 25.6$

$15b + 4 = 25.6 - 0.6$

$15b + 4 = 25$, which is same as equation $B$.

$15b = 25 - 4$

$15b = 21$, which is same as equation $D$.

Take equation $C$,

$3 (0.6 + 15b + 4 ) = 76.8$

$0.18 + 45b + 12 = 76.8$

$45b + 12 = 76.8 - 0.18$

$45b = 76.62 - 12$

$45b = 64.62$, this is not same as the given equation.

Therefore, equation $B$ and equation $D$ are equivalent to the equation $0.6 + 15b + 4 = 25.6$.

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