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Alex787 [66]
2 years ago
7

Solve the system of equations using the substitution method.

Mathematics
2 answers:
Kitty [74]2 years ago
8 0

Answer:

Step-by-step explanation:

x = -5/8 and y = -7/4

so

x = -0.625 and y = -2.25

alexandr1967 [171]2 years ago
5 0

Answer:

x = -0.625

y = - 1.75

Step-by-step explanation:

y = 2x - 1/2  ------------(I)

2x - 3y = 4   ---------(II)

Substitute y =2x - 1/2 in (II)

2x - 3*(2x -  \dfrac{1}{2})=4\\\\\\2x - 6x +  \dfrac{3}{2}=4\\\\-4x =  4-\dfrac{3}{2} =  \dfrac{8}{4}- \dfrac{3}{2}\\\\-4x =  \dfrac{5}{2}\\\\x = \dfrac{5}{2}* \dfrac{1}{-4}\\\\x=  \dfrac{-5}{8}\\\\x= -0.625

Plugin x = -0.625 in equation (I)

y = 2*(-0.625) - 0.5\\\\y = -1.25 - 0.5\\\\y = -1.75

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den301095 [7]

Answer:

d + n = 147

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d = 86, n = 61

Step-by-step explanation:

Let

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d + 61 = 147

d = 147 - 61

d = 86

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