let the number be x for all the qns
1. x/3+4=7
x/3=3
x=9
2. x^2+7=32
x^2=25
x=5 or -5
3. 30÷7x=1
30=7x
x=30/7 or 4.29(3.s.f.)
Answer:
24
Step-by-step explanation:
The answer to this is 493/1000
-47 - 15y =-17.....Equation A
-x+ 5y=-13..........Equation B
Solve B for y.
-x + 5y = -13
5y = x - 13
y = (x - 13)/5
Plug y into A.
-47 -15y = -17
-47 -15(x - 13)/5 = -17
-47 -3(x - 13) = -17
-47 -3x + 39 = -17
-3x - 8 = -17
-3x = -17 + 8
-3x = -9
x = -9/-3
x = 3
Now that we know x is 3, plug 3 for x into EITHER Equation A or B (your choice) to find y.
I will let you do that.
(19+7)(2×6+1)
Step-by-step explanation:
(19+7)/(2×6+1) = 2
26/13 = 2
2 = 2