Question

Реши уравнения.48:z+879=887.974-b:7=869.y:2-275=145

Answer 1

48÷z  + 879 = 887
48÷ z  = 887  - 879
48÷z=8
z= 48÷8
z= 6
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48÷6+879=887
8+879=887
887=887

974 - b÷7=869
b÷7= 974-869
b÷7= 105
b= 105×7
b= 735
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974 - 735÷7=869
974 - 105=869
869=869

y÷2 -275=145
y÷2=145+275
y÷2= 420
y=420×2
y=840
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840÷2  - 275=145
420-275=145
145=145