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If x = 3, then substituting x = 3 into the expression 7x - 2x gives us 7(3) - 2(3). This simplifies to 21 - 6, which equals 15. Therefore, the value of 7x - 2x when x = 3 is 15.
The idea is to replace every occurrence of "x" with "3", then do the calculations. Note, for example, that 7x means 7 times x.
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Solve 2x plus 3 equals 9 x equals?
2x+3=9x 3=9x-2x 3=7x x=3/7
7x-4x plus 2x plus 5 equals 2x plus 14?
7 x - 4 x + 2 x+5 = 2 x + 14 --- (1) Shift those terms containing "x" on left side and constants on other side 7 x - 4 x + 2 x - 2 x = 14 - 5 We will get 3 x = 9 Divide both sides by "3" we get; x = 3
What is the value of x if given x-3 and 2x-8?
If you mean: x-3 = 2x-8 then the value of x works out as 5
X2 plus 7x plus 10 equals?
The value of x2+7x+10 depends on the value of X. If x=1, then x2+7x+10 = 18 If x=2, then x2+7x+10 = 28 If x=3, then x2+7x+10 = 40 and so forth
What is 2x plus 3?
3 + 3 + 2x = 0 6 + 2x = 0 2x = -6 x = -6/2 x = -3
Solve 2x plus 3 equals 9 x equals?
2x+3=9x 3=9x-2x 3=7x x=3/7
What is the answer 2x2 plus 7x plus 3?
2x2 + 7x + 3 = (2x + 1)(x + 3)If 2x2 + 7x + 3 = 0 then:(2x + 1)(x + 3) = 0⇒ (2x + 1) = 0 → x = -1/2or (x + 3) = 0 → x = - 3
7x 3-2x if x 8?
7x+3-2x= if x=8 5x+3 5(8)+3 40+3 =43
2x plus 3 equals 9 x equals?
2x+3=9 2x=9-3 2x=6 2x/2=6/2 X=3
2x plus 7x minus 10 equals 4x plus 3 minus 2x?
2x+7x-10=4x+3-2x 9x-10=2x+3 7x=13 x=13/7ans
Factor 2x squared plus 7x plus 6?
2x2 + 7x + 6 = 2x2 + 4x + 3x + 6 = 2x(x + 2) + 3(x + 2) = (x + 2)(2x + 3)
What is 7x-2x equals 7 plus -2x?
It is an equation and the value of x is 1
Factor 7x2 - 19x - 6?
7x2-19x-6 7*6=427x2-2x+21x-6[7xx 2x] [3*7x 2*3]x(7x-2)+3(7x-2)Answer: (7x-2)(x+3)
What is 10x-3-2x equals 4?
10x - 3 - 2x = 4 7x - 3 = 4 7x = 7 x = 1
7 plus 7x--2x plus 3?
7 plus 7x--2x plus 3 is: 7 + 7x + 2x + 3 = 0 9x + 10 = 0 9x = -10 x = -10/9 = -1 1/9
What is 2x squared plus 7x-15 factored?
2x2 + 7x - 15 = (2x - 3)(x + 5)
What is the answer for 7x equals 2x plus 5?
The value of x is 1
