Add 5 to both sides of the equation to get rid of the - 5.
-3x - 5 + 5 = -20 + 5
Solve and simplify.
-3x = -15
Divide both sides of the equation by -3.
x = 5
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x-14 = 20 x = 20+14 x = 34
You haven't given the solution to the equation ! 3x + 20 = ? If you have the number for the question-mark - you can find the value of x ! For example in the equation 3x + 20 = 50... the value of x is 10.
Multiply first equation by 2: 4x - 2y = 20 Subtract second equation: x = 12, so y = 14.
4y = 2y + 40 4y - 2y = 2y -2y +40 2y = 40 y = 20 check 4(20) = 2(20) +40 80 = 80
5X + 5 = 25 subtract 5 from each side 5X + 5 - 5 = 25 - 5 5X = 20 divide both sides integers by 5 (5/5)X = 20/5 X = 4 -----------check in original equation by inserting 4 into X place 5(4) + 5 = 25 20 + 5 = 25 25 = 25 -----------checks