Answer:
(a) x + 3 = 11
(b) x - 2 = 15
(c) 3x -2 = 4
(d) 2(x-7) = 13
Explanation:
Given:
(a) 3 added to a number is 11
(b) 2 subtracted from a number is equal to 15.
(c) 3 times a number decreased by 2 is 4.
(d) 2 times the sum of the number x and 7 is 13.
Solve:
(a) 3 added to a number is 11
Answer : x + 3 = 11
Base on the given it states that 3 added to a number is 11. A number is identified as x. Hence, a number added 3 equal 11.
Hence, x + 3 = 11 is the equation.
(b) 2 subtracted from a number is equal to 15.
Answer : x - 2 = 15
Base on the given 2 subtracted from a number is equal to 15. As known, a number is identified as x. Equal to 15 = Total. Hence, x - 2 = 15.
(c) 3 times a number decreased by 2 is 4.
Answer : 3x - 2 = 4
Base on the given 3 times a number decreased by 2 is 4. As known, a number is identified as x. 3 times is identified as times 3. And decreased is identified as subtract. Hence, 3x-2 = 4 is the equation.
(d) 2 times the sum of the number x and 7 is 13.
Answer : 2( x + 7 ) = 13.
Base on the given 2 times the sum of the number x and 7 is 13. As known, a number is identified as x. 13 is the total. 2 times equals multiply 2. Sum of the number x and 7 meaning is Addition. Sum = Addition. Hence, 2(x+7)=13 is the equation.
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