# System of equations - 8th grade (13y) - math problems

#### Number of problems found: 439

• Linear system Solve this linear system (two linear equations with two unknowns): x+y =36 19x+22y=720
• Simple equations Solve system of equations: 5x+3y=5 5x+7y=25
• Equations Solve following system of equations: 6(x+7)+4(y-5)=12 2(x+y)-3(-2x+4y)=-44
• Equations - simple Solve system of linear equations: x-2y=6 3x+2y=4
• Two equations Solve equations (use adding and subtracting of linear equations): -4x+11y=5 6x-11y=-5
• Substitution solve equations by substitution: x+y= 11 y=5x-25
• Linear system Solve a set of two equations of two unknowns: 1.5x+1.2y=0.6 0.8x-0.2y=2
• Sweets 3 chocolate and 7 cakes cost 85, - CZK. 2 chocolates and 6 cakes cost 86, - CZK. How much is 5 chocolates and 9 cakes? I wonder how to get the result, but only by logic without the use of a system of equations
• Two numbers Find two numbers whose difference and ratio is 2.
• Algebrogram Solve algebrogram: mama+anna=vari How many solutions are?
• Algebrogram Solve algebrogram for sum of three numbers: BEK KEMR SOMR ________ HERCI
• Two numbers 7 The sum of two consecutive even numbers is 30. Find the numbers.
• ATC camp The owner of the campsite offers 79 places in 22 cabins. How many of them are triple and quadruple?
• Three ints The sum of three consecutive integers is 2016. What numbers are they?
• Value 4 If 5/18=425, what is the value 13/18?
• Viju viju has 40 chickens and rabbits. If in all there are 90 legs. How many rabbits are there with viju??
• Number ratio Calculate two positive numbers that its ratio is 6:6 and difference was 0.
• Flowerbed Ondra digs the bed in 20 minutes. Cuba in 30 minutes. For how long do they dig together?
• Unknown numbers The sum of two consecutive natural numbers and their triple is 92. Find these numbers.
• Rabbits 3 Viju has 40 chickens and rabbits. If in all there are 90 legs. How many rabbits are there with Viju?

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