3x2 = 21 describes two single values, and does not have an x intercept. 3x2 = 21 ∴ x2 = 7 ∴ x = ±√7
3x - 7 = 2 3x = 9 x = 3
if 3x+7 = 3 then 3x = 3-7 3x = -4 then, x = -4/3
If: 3x+2y = 5x+2y = 7 Then: 3x+2y = 7 and 5x+2y = 7 Subtract the 1st equation from the 2nd equation: 2x = 0 or x = o By substitution: x = 0 and y = 3.5
Linear. The only power for the variables is 1.
The number 7 raised to the 2nd power (or squared) equals 49.
3x2 = 21 describes two single values, and does not have an x intercept. 3x2 = 21 ∴ x2 = 7 ∴ x = ±√7
3x+7=37 -7 -7 3x=30 /3 /3 x=10
3x+7=4x 7=4x-3x 7=x
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
3x - 7 = 2 3x = 9 x = 3
3x = 7-4x 3x+4x = 7 7x = 7 x = 1
if 3x+7 = 3 then 3x = 3-7 3x = -4 then, x = -4/3
7
If: 3x+2y = 5x+2y = 7 Then: 3x+2y = 7 and 5x+2y = 7 Subtract the 1st equation from the 2nd equation: 2x = 0 or x = o By substitution: x = 0 and y = 3.5
Linear. The only power for the variables is 1.
7-3x = -4x + 13x = 6