If x = 2x + 3, x = 3/2x + 7, Find the value of
Solution:
We have to find the value of
Put x = 6 in the expression 2x + 3,
= 2(6) + 3
= 12 + 3
= 15
Put x = 3 in the expression 3x/2 + 7,
= 3(3)/2 + 7
= 9/2 + 7
= (9+14)/2
= 23/2
Put x = 1 in the expression x - 3,
= 1 - 3
= -2
= 2(15) + (23/2) - (-2)
= 30 + (23/2) + 2
= 32 + 23/2
= (64+23)/2
= 87/2
Therefore, the required value is 87/2.
✦ Try This: Keerthi's father gave him some money to buy books. He spent half of the money equally to buy books and entertain his friends. Whatever amount left with him, he deposited half in his savings account and gave Rs. 5 to a poor person as charity. Finally, Keerthi was left with Rs. 20 which he returned to his father. What amount did his father give him initially?
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 12
NCERT Exemplar Class 7 Maths Chapter 10 Problem 89 (i)
If x = 2x + 3, x = 3/2x + 7, Find the value of
Summary:
Therefore, the required value is 87/2.
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