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Unit 6 test

Last updated over 5 years ago

10 questions

1

x= - 4 is a solution of the equation

1

the solution of the equation 3-(4x-3)=6 is x=

1

If - 4x>20, then x >-5

1

Write the solution set of the inequality 2 x - 5<4(x+1.25)

1

There is/are solution(s) to the equation 2x+y=8

1

A shop set the selling price of a certain brand of clothes at 40% more than its cost price. Later in a promotion, it sold the clothes at a 20% discount, and as a result it still made a profit of 15 yuan for each set sold. If we let the cost price be x yuan. Which equation is correct?

1

Solve the system of linear inequalities in one variable .

1

Solve the system of linear equations in two variables.
2x-y=3
3x+2y=8

1

1

There are 420 students in three grades in a school. There are 4 more students in the secondary first grade than the secondary second grade .The number of students in the secondary third grade is 2/3 of the number in the secondary second grade. Write the number of students in the third grade .