Mister Exam
Other calculators
-
How to use it?
- Equation:
-
Equation tan(x/3)+1=0
- Equation (-12*x-(-24)*y)-(-12*x+(-15)*y)=-51
- Equation (3x+5)-7=19
- Equation (-exp^(2x))-18*exp+9=-72
- Express {x} in terms of y where:
- -4*x-19*y=5
- -4*x-16*y=-2
- -10*x+2*y=16
- -13*x-8*y=-16
- Integral of d{x}:
- 19
- Sum of series:
-
19
- 19
-
Identical expressions
- (3x+ five)- seven = nineteen
- (3x plus 5) minus 7 equally 19
- (3x plus five) minus seven equally nineteen
- 3x+5-7=19
-
Similar expressions
- (3x-5)-7=19
- (3x+5)+7=19
(3x+5)-7=19 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the left part
Looking for similar summands in the left part:
Move free summands (without x)
from left part to right part, we given:
$$3 x = 21$$
Divide both parts of the equation by 3
We get the answer: x = 7
(3*x+5)-7 = 19
Expand brackets in the left part
3*x+5-7 = 19
Looking for similar summands in the left part:
-2 + 3*x = 19
Move free summands (without x)
from left part to right part, we given:
$$3 x = 21$$
Divide both parts of the equation by 3
x = 21 / (3)
We get the answer: x = 7