3 years ago

Which is a correct first step for solving this equation? x+7=2x+5−4x

Mathematics

2 answers:

Dmitry [639]3 years ago

8 0

The correct first step would be to gather all like terms together:
2x-4x-x = 7+ 5
-3x = 12
x = -4

adelina 88 [10]3 years ago

3 0

Answer:x+7=2x+5-4x

x+7=-2x+5

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Vesna [10]

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So it's the first option.

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Step-by-step explanation:

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4 years ago

Martin is two years younger than three times his daughter Ada’s age. The sum of their ages is 54. If Ada’s age is given by a, th

Igoryamba

Answer:

Martin is 40 and Ada is 14

Step-by-step explanation:

Martin's age = m
Ada's age = a

Martin is two years younger than three times his daughter Ada’s age:

m = 3a - 2

The sum of their ages is 54:

m + a = 54

Solving this equation for m:

m = 54 - a

Eliminate m:

3a - 2 = 54 - a

Solve for a:

3a + a = 54 + 2
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Find m:

m = 54 - 14 = 40

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8 0

3 years ago