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Question

For which equation(s) is x=3 a solution?
(I) 2x5+3x=10 (II) x+72=2
(III) 4x11=17 (IV) 9=(x1)+11

A
I only
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B
I and II
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C
I,II and III
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D
I,II and IV
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Solution

The correct option is D I,II and IV
(I) 2x5+3x=10
5x5=10
5x=10+5=15
x=155=3
(II)(x+7)2=2
x+7=2×2
x=47=3
x=3
(III)4x11=17
4x=17+11
x=284=7
(IV) 9=(x1)+11
9+(x1)=11
x+8=11
x=118=3
Answer :D

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