7+x=15 x=8
2*(4*7 + 7*15 + 15*4) = 386 square units.
13 x (15 + 7) ie 13 x 22 = 286 or 13 x 15 = 195, 13 x 7 = 91, 195 + 91 = 286
2x + 3 = x - 4 2x + 7 = x x + 7 = 0 x = -7 2(-7) + 3 = -11 (-7) - 4 + -11
First of all add all common factors. In par. (2x) + 15 + (2x) = 180 4x + 15 = 180 Divide 4x and 180 by 4. (4x/4) + 15 = (180/4) x + 15 = 45 Then subtract 15 to 15 and 45. x + (15-15) = (45-15) x = 30 Answer is X = 30.
7
15 x 3 = 45, 45 + 4 = 49 Or 15 x (3+4) 7 = 105
7+x=15 x=8
The answer is 8. In the statement "7 plus blank 15," the word "plus" indicates addition. So, the expression can be written as 7 + x = 15, where x is the unknown number. By solving for x, we find that x = 8.
x+x+2+x+4+x+6=42(x+x+x+x)+(2+4+6)=424x+12=424x=30x=15/2or 7 and 1/2
x = 7
Depends on where the parentheses are. X(7-4) + X7 + 4 = 10X + 4 X(7-4) + X(7+4) = 14X
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
(7 - x/4) = 15 x/4 = 7 - 15 x/4 = -8 x = -32 Verification: 7 - ( -32/4) = 7 - (-8) = 7 + 8 = 15
It is -x -15.
Subtract 7 from each side of the equation: 2x = 8 Divide by 2: x = 4
If: x + 2/2 + x + 5/7 = 4 Then: x = 8/7